Showing posts with label forensic science. Show all posts
Showing posts with label forensic science. Show all posts

Tuesday, March 18, 2014

"My Book the Movie"

Sheila Lowe, mystery author and forensic handwriting analyst

I'm in Vancouver this week, working my considerable butt off analyzing handwriting at the 2014 TED Conference (hoping to meet speakers Gabby Giffords, Bill Gates, and Sting, at least!). So my entry today is a reprise, albeit slightly edited, of one I once wrote for Marshall Zeringue's great blog, Mybookthemovie.blogspot.com. Marshall asks authors to share which actors they would pick for their main characters, which was great fun to think about.

Like me in real life, my character Claudia Rose is a forensic handwriting expert who uses her special knowledge to understand the people she gets involved with—especially the ones who create problems. She’s also an independent 40 year-old, facing the challenges many modern women do. She has an LAPD detective lover, Joel Jovanic, and friends Kelly Brennan, a man-eating family law attorney, and Dr. Zebediah Gold, a semi-retired criminal psychologist.

I thought about some of my all-time favorite movies and discovered that Jeannot Szwarc had directed Somewhere in Time, and also currently directs numerous forensic-type shows, so he’s the perfect fit for my forensic handwriting mysteries.

My number one pick for Claudia is Minnie Driver, and many readers of my series agree there’s something very Claudia in Minnie’s energy and her looks. If Minnie isn't available, Amy Adams would be just as perfect (she has the right color hair). When I first created Jovanic, I had in mind a cross between Michael Keaton and Harrison Ford, and then I thought—Denzel Washington! But it took so long to get published that now they’re all too old (sorry, guys). Recently, I saw Olympus Has Fallen and Gerard Butler is Jovanic. He’s goodlooking without being a pretty boy, you can tell he’s sharp and intelligent, and there’s a seriousness to him that would make him a good police detective. He’s about the right age now, so we need to hurry and get this thing made!

Claudia’s irreverent friend and confidante, Zebediah Gold, reminds me of Sean Connery (or someone who looks just like him and has those twinkly eyes). Reese Witherspoon is cute enough and perky enough to be Kelly, but the part might not be big enough for someone with her star power.

If I had a buck for everyone who’s said to me, “this series would make a great movie!” I could buy a new Mont Blanc pen. Happily, the series has already been optioned, so maybe someday my druthers will actually find their way to the screen. Inkslingers Ball, the next Claudia Rose mystery, is set for a May release. This will be the first new Claudia book since 2010.

Tuesday, October 23, 2012

The Criminal Choice Behind Burglary

by Tom Adair author of the 2012 Crime Thriller The Scent of Fear.

As a former CSI I tried to understand how the criminal thinks. It's impossible to consider every single motivation but there are some generalities that may aid investigators in uncovering certain clues. As an author I find this insight very valuable because weaving this mindset into your storyline gives a sense of realism I think readers respond to. Everyone wants to understand motive. It's how we begin to make sense of things and challenge our world view. As a reader I want to understand the motivations of the killer, victim, cops, and others too. It helps me understand why they do what they do.

I've talked to a lot of victims that ask me a simple question; "why me?". It's not a dumb question. While it is true that some victim's may just be int he wrong place at the wrong time (like a shark attack), others increase their vulnerability to crime and criminals (like joining a gang). So it's helpful to consider what types of factors criminals may consider when choosing a victim. I thought it would be simpler to frame the discussion within the topic of burglary. In truth, some of the selection criteria can be applied to other crimes as well but let's just stick with burglary for now.

Burglars typically choose a place to burglarize for one of three reasons. These are broad categories with some cross over but they will serve for the discussion.
  1. Inside knowledge (intelligence)
  2. Vulnerability with reward
  3. Opportunity (wrong place wrong time)
Inside Knowledge: 
In the military this is called intelligence. You'd be amazed how often a burglary can be tied to intelligence. The world war two warning of  "loose lips sink ships" actually works with criminals too. If criminals find out that you have things of value they may want to look for an opportunity to take them. I often say that many criminals want "easy" so you have to do your best to avoid helping them. Here are some of the biggest sources of "intelligence leaks" in the household.
  1. Children. Children are the worst. Kids love to tell stories and brag to their friends. "We just got a new computer", "My mom just inherited a bunch of money", "I just got a brand new XBOX", etc. Even when talking to 'trusted' friends the conversation may be overheard by others.
  2. Social Media. I am always amazed at people that tell the twitterverse that they are on vacation. They get on Facebook and say "Hey! We're a thousand miles away from our house and NO ONE is watching it". Many don't have the smarts to lie and say something like "Thanks God my brother is on leave from the Marine Corps and is watching the house with an attack dog!".
  3. Visitors to the house. This can be anyone from your son's new "gangsta friend", ex-boyfriend, or repairmen. We often don't consider what a stranger might see in our homes like jewelry being left out, or even where we keep money (when you pay a serviceman).
Vulnerability with Reward:
I link these two together because the burglar is more likely to exploit a vulnerability if they know there is a reward for their risk. One of the biggest vulnerabilities is easy access to the residence or business. Some of the biggest culprits are;
  1. Open garage doors
  2. Open windows or unlocked doors (houses and vehicles)
  3. Items of value with easy access (like a purse or wallet left on the front seat of your car)
Other things can include ladders propped up against houses (for easy access to second story windows that are usually left unlocked) or newspapers or fliers piled up outside (indicating you're on vacation). The reward/risk issue is equally important. Wanna guess a percentage of how many homes displaying signs like "Dangerous dog", "Video Surveillance Used" or "Trespassers will be shot, survivors will be shot again" get burglarized compared to ones not displaying butterfly flags? Most criminals want "easy". Now all of this changes if your house is the only place to get what they want. So if you have a rare and valuable item (like the Hope Diamond) then the motivated criminal will look for a way to get it but, that is usually not the case. However, the higher the value of the item being sought, the more risk one may take to get it.

Opportunity:
This embodies the "wrong place, wrong time" meme. Obviously, the best way to avoid being in the wrong place is being more selective about the places we visit. I spend a fair amount of time in the back country of the Rocky Mountains. I feel much safer walking through the woods at midnight than an alley in many metropolitan cities. Some places are "wrong" for some folks no matter the time of day. Your characters may increase their risk of being attacked (mugged) because they are forced to go places they wouldn't normally choose. Maybe your PI has to go into a seedy bar or maybe somebody gets arrested and goes to jail for a few days. These exposures put them at increased risk. They may survive without incident but the tension is still there. From a criminal perspective it is literally the fly in the spider net. They simply wait for some unsuspecting victim to cross paths with them. The single attractive woman or suburban teenager with the iPod that has to ride a subway through the bad part of town at midnight.

Considering these factors when developing your plots, characters, and dialog will help explain the motivations of your characters and give a perspective for the reader when digesting the story. Remember, the motive has to align with the risk/reward calculus to be believable. A criminal won't rob a homeless man with a shopping cart full of old smelly clothes, empty liquor bottles, and a dead fish ;).

Tuesday, September 25, 2012

How to Write a "Bad" Expert Witness

by Tom Adair author of The Scent of Fear (2012)

One of the most interesting observations I have made in the courtroom is what passes for an "expert witness". In the United States, judges act as "gate keepers" for the admissibility of scientific evidence and expert testimony. The legalese can get pretty convoluted but in the end the judge can pretty much rule any way they want and let the jury decide how much "weight" they prescribe to the evidence or testimony. Also, in the US the burden of proof is on the prosecution and some judges give a bit more latitude to the defense in terms of whom they offer to testify for their client. I know of one case where an "expert" in entomology was allowed to provide expert testimony in a murder case. Their qualifications? They worked at the local zoo and raised insects to feed to the reptiles.

At times throughout my law enforcement career I have worked as an independent expert for both the prosecution and defense. Defense experts sometimes get a bad rap in my opinion just because they work for the accused. In truth, there are some really good experts out there whose only allegiance is to their analysis. However...there are some "experts" who may not follow a strict ethical code. When you come up against one of these folks it can get really frustrating. They may seem very credible to a lay jury, judge, and even the attorney unless someone is there to point out the inconsistencies. As a writer, understanding how these experts behave can add some real texture to your dialog and storyline.

One of the biggest tells is their tendency to set standards for others that they themselves do not meet. They love to make grandiose statements about how investigations or analyses should be conducted.  In one case an opposing expert said that a "good investigator" reviewed every single photo and every single piece of evidence in a homicide. He sat up on the witness stand with a semi-large photo book so I had the prosecutor ask him if those were the photos (provided by defense) that he had examined and then had him count them. Long story short he had reviewed only 10% of the photos taken at the crime scene. I then had him review the evidence log showing which items of evidence he had checked out for his examination. This time it was less than 5%. So in a few questions he confirmed though his own definition that he was a "bad" investigator and his testimony was largely ignored by the jury.

Sometimes it is not the expert but the attorney that lays the groundwork. They may attack the opposing expert for not having enough training, experience, or certifications. They basically set the bar very high for the opposing expert. However, they don't consider (or maybe they hope no one else will) whether their own expert meets those same standards. So you could have an attorney challenge an expert on the basis that they lack a board certification in a particular forensic science field. Of course, when their expert takes the stand and lacks the same qualifications the jury is left wondering just how seriously the attorney believed what they said.

In another case which happened about a decade ago an expert claimed that a new DNA process (and machine used to do the testing) were unreliable and shouldn't be considered by the court. The opposing attorney called the manufacturer to provide a rebuttal and imagine their surprise when they discovered that the expert in question had bought one of the units for their practice at the cost of over $80,000.00! They had even used it for examinations in other cases and never once mentioned their hesitation to use the technology when testifying in those cases. So the opposing attorney simply asked something like "why would you spend so much money on a technology that you claim is unreliable and then use it in other cases?"

It has been said that a courtroom is two thousand square feet surrounded by reality. In truth, each side is allowed to advocate their own position and interpretation of the evidence within certain rules and guidelines. This reality leave a lot of wiggle room though. A good attorney can convince a jury of the absolute truth of their claim. That is, until the opposing attorney takes the stage. Trials can seem like a roller coaster ride going up and down and upside down. Your experiences range from nausea to unmitigated joy. I thing that is the essence of good writing too. So if you are writing a courtroom scene don't just settle for a he said, she said type of exchange. Give your characters some secrets or positions they can't possibly maintain. After all, that's what the "experts" do.




Tuesday, September 11, 2012

A Day in the Life of a CSI

A few days ago a young student contacted me about a paper she was writing. What is a day in the life of a CSI like? It was an excellent question with a not so simple answer. You see, the job of a criminalist is largely reactionary. We have to wait for crimes to occur before we spring into action and criminals are never courteous enough to send an RSVP. The only things scheduled in our lives are meetings, courtroom testimony, and vacations, all of which can be upended in the blink of an eye. Knowing that, I wasn't sure how to answer her question because there never is a "normal" day in the crime lab. You walk in the door each morning with no idea what you might find. The day may be dull or you may get called to the worst mass murder in state history.  I suppose that CSIs have to remain emotionally and physically fluid. Like a race car ready to switch gears from neutral to red-line in seconds.We tend to go with the flow and accept change easily.  So I thought it might be best to describe both a "slow" day and a "busy" day while admitting that most days have elements of both.


The "Slow" Day:
I wish I could say that every day is like an episode of CSI: Las Vegas but I'd be lying. We don't even get a soundtrack. CSIs have a lot of boring duties. First, there's report writing. As writers, you may not fully appreciate how boring this can be but report writing is dull and unimaginative. It has to be. As Joe Friday loved to say we just want to convey the facts and rarely do we inject opinion. Then there are the meetings...ugh. Some productive, most a waste of time, and all of them mandatory. You may be stuck in a four hour meeting on verbal conflict resolution or a lecture on the proper investigative response to a nuclear detonation (which surprisingly to me was not run like hell). Some training is by request. These are the specialized schools or classes where we learn to apply the skills of our trade. Sometimes a good school feels more like a vacation but in the back of your mind you recognize that lab requests are piling up in your inbox..

Court can be a mix of both good and bad.  You never know what an attorney will ask you so that keeps you on your toes and presents a bit of intrigue to the proceedings. That's assuming you actually make it into the courtroom. Since there is no way to tell how long any given testimony will take you often have to wait around for your turn. This may be hours or even days. The magazines are old, the coffee sucks, and the television is permanently turned to either the weather channel or Judge Judy. It's kind of like hell without the culture.

When you aren't tied up with those fun activities you'll likely be working on laboratory requests. These too can run the spectrum from interesting to mundane. Let me tell you...after processing three hundred documents with Ninhydrin the shine of the assignment rubs off a little. Sometimes you get something fun like a gun or knife used in a serious crime or something requiring a novel or unique processing technique; but you're more likely to be processing trash or beer bottles from a stolen car or gang party. The good news is that there is never a shortage of lab requests from detectives all of which will be labeled "RUSH". It doesn't matter how petty the crime is, they needed it yesterday.

The "Busy" Day:
I think it's safe to say that every CSI lives for the busy day. Whether you are running from call to call or at one of the biggest scene of your career, the adrenalin rush and excitement seem to know no limits. Some CSIs in large crime ridden cities may disagree with that last part because they go from call to call every shift of every day but most CSIs don't experience that. You may go from a burglary, to a bank robbery, to a rape, and then a suicide; all before lunch! I've had seven deaths and an aircraft arson all in a twenty four hour span. Yes, it can be tiring and taxing on your body but it beats the hell out of report writing. You may be running on little or no sleep. If you're lucky you can stop by a drive thru window or a patrol officer will run and grab you something to eat. Oftentimes you're too busy to care. Of course, almost every busy day is followed by a slow day of paper work and report writing but, in that moment, out there running from call to call, you feel alive. You feel needed.

There is something about being a CSI I can't really put into words. Being entrusted with the responsibility of chasing bad guys is worth all the tedious aspects of the job.  Of all the people in the city or county, they called you. It's your turn to make a difference. The busy day is where we learn to be better CSIs. There is no college course that can compare to an actual crime scene. This above all else, is probably why I love the busy days. I learn, I grow, and I build my confidence in a career filled with criticism and doubt. So, what is a day in the life of a CSI? It's a spin of the Roulette wheel, a roll of the dice. You never know where your number will land but you know that no matter what...you'll be playing again the next day.

In some ways it's comparable to writing a novel. I have an outline but my story develops organically, much like you I would guess. There are times I write a scene that I love; a scene I never envisioned when I sat down to type that morning. Other days I just read and research. Sound familiar? If you're writing a scene with a CSI try to imagine what kind of day they are having. How will the activities of that day affect their demeanor, their dialog, judgement, or their critical thinking? Will they be physically taxed or ready to spring from the starting gate? No matter how you write it, a day in the life of a CSI is never the same. Whether slow of fast a CSI's day is just waiting to be written.

Written by Tom Adair, author of the 2012 crime thriller The Scent of Fear. Tom also blogs at forensics4fiction.com.

Tuesday, August 14, 2012

Exploding the Myth of Bullets in Fire

There is a common depiction in movies and novels of bullets exploding and "shooting off" when exposed to fire. The idea is pretty straight forward. Throw a cartridge into a fire and the heat will set off the gunpowder. It can make for some harrowing scenes. The gunshots can cause a distraction, pin down the cops, or even kill someone. Unfortunately, the entire idea is fiction.

Heat damage to live ammunition occurs more frequently than you may think. Over 70 million homes have ammunition in the United States and when one of those homes goes up in flames, so does the ammo. We call it "cook off". The process will generate the sound of gunfire but little else. Huge cook offs at military (small arms) ammunition depots have been recorded with little or no destructive effects (other than the fire that is).

Firearms work because they contain a small explosion. All of the gasses and energy released from the casing has only one direction to go; out the muzzle. Barrel diameters match the caliber of the bullets being fired through them. The fit is extremely tight so the gasses stay behind the bullet and propel it down the barrel. But when the cartridge is not in the firearm then the energy is released in all directions from the casing opening. They're like tiny little pipe bombs with a loose end cap. The gunpowder also burns at a slower rate in a fire as opposed to a primer charge. When the heat ignites the gunpowder the bullet will basically "pop" off. Since there is nothing to contain the pressure, the bullet can't fly off at the designed muzzle velocity.

So as a sound effect or distraction, throwing cartridges into a fire can be very effective. That doesn't mean you can't get hurt if you're standing next to the fire (don't try this anywhere) but the bullets won't be traveling with the speed they normally leave the barrel of a gun.So if you are writing a scene where a character throws a handful of small caliber bullets into a fire remember that they act more as a sound effect than anything else.

Tuesday, July 17, 2012

Making Silencers Silent

 A hit man just wouldn't be hit man without a silenced firearm. But, silencers (technically referred to as suppressors) affect only one aspect of sound. You see, in order to properly use a silencer in your writing you need to understand how sound works following the discharge of a gun. Sound is important evidence. Whether writing about a barking dog or a gunshot it's important for writers to understand how sounds will be heard by various characters. Sound is basically produced by disruptions in the air causing pressure waves. Modern firearms create two distinct sounds when fired. 

The first sound is created when the cartridge is fired. A modern cartridge is comprised of a casing which houses the powder and seats the bullet. On the bottom of the cartridge is the primer. This is a small disc in the center of the head stamp. When the firing pin strikes the primer it ignites the gunpowder in the cartridge and the pressure forces the bullet down the barrel. The gases produced by this small explosion are also forced down the barrel. This is the first source of sound produced from a gunshot.

Suppressors are screwed or seated onto the muzzle of the barrel. You're probably very aware of their appearance. They look like a thicker tube (usually twice as thick as the barrel at least) sticking out the front of the gun. Suppressors have a variety of proprietary designs but they all function in basically the same way. Baffles inside the cylinder "dampen" the gas pressure and sometimes even slow the velocity of the bullet. By dispersing and dampening the gasses the suppressor reduces the disruption of air; which reduces sound. The more the baffles dampen the air the less sound produced.But the use of a silencer (suppressor) may not eliminate the sound of a gunshot.

That fact is due to the second main source of sound in a gunshot; the sonic boom of the bullet traveling through air. This is an independent act that occurs after the bullet has left the suppressor. It is well known by shooters that the bullet strikes the target before the sound wave does.  Most modern cartridges are capable of reaching super-sonic speeds. Putting a suppressor on the end of a gun doesn't usually change this fact. I've worked for law enforcement agencies that used suppressed weapons in a variety of tactical assaults. One "benign" use would be to shoot out the tires on a suspect vehicle parked outside his residence while the SWAT team is preparing to make entry.

In order to do that the shooter must use "sub-sonic" ammunition. This ammunition is designed to have a muzzle velocity below the speed of sound. Still powerful enough to shoot out a tire but not enough to make a sonic boom. Most authors don't get into this level of detail but it wouldn't hurt to mention that your character is firing sub-sonic ammunition with their suppressed weapon. You'll demonstrate your knowledge about how sound works and might keep a couple of critics at bay. Sub-sonic ammunition is easy to find and some bench shooters use it for plinking so as not to disturb their neighbors or damage their ears. Now there will always be some level of sound from the mechanical function of the slide or dropping of the hammer but for all practical purposes the weapon will be "silent".

Tuesday, March 27, 2012

Interview with Former CSI and Author Tom Adair

It’s Tom’s day to post, but he’s been shy to talk about his first novel, so I prompted him with a bunch of questions. If you haven’t heard, Tom released The Scent of Fear recently, and based on his background as an exceptional forensic scientist, it’s no surprise his novel is pretty special too. Here’s more in Tom’s own words:

LJ: Did a specific event or crime inspire this story?
Tom: They say that you should write what you know. While the story is fictional, many of the events are inspired by actual cases I’ve worked. I’ve changed many of the details but a number of colleagues have commented on the similarities. I think it adds tremendous realism to the story by keeping it within the property line of my experience. In some ways writing this novel was therapeutic too. The crimes I saw in my career were not the types of things you can talk about at the dinner table. My family knew what I did but they never had a clear picture. It was my way of protecting them from the evils I saw. In The Scent of Fear I had the opportunity to shed some baggage I had been holding on to. It gave me permission to unburden myself.

LJ: Who is your protagonist modeled after? Because you’ve had the same career as your protag, is it difficult to keep her actions/thoughts distinctly separate from yours?
Tom: I don’t want them to be separate. Put simply, she’s the girl next door that can kick in the door. Sarah Richards could be compared to so many young professional self confident women in law enforcement. I love the depth her character offers me as a writer. Sarah has a wonderful mix of strength and vulnerability I couldn’t create with a male protagonist. She is young and impulsive and that makes for some hairy situations she finds herself in, but that can be said of so many young professionals. Sarah was created as a franchise character and I can’t wait to see how she develops with age and experience (just as I did).

LJ: Does the novel have a theme or message you want the reader to come away with?

Tom: Be fearless! So many of us let fear run our lives and it usually makes us miserable. Fear also keeps us from reaching our full potential. Sarah has fears but she must rely on her inner strength and morality to persevere (physically and spiritually). That is her story. In the end she only has herself to rely upon (metaphorically speaking; that was not a spoiler).

LJ: What else do you want readers to know about this story?

Tom: On a serious level I wanted to give readers a peek behind the curtain of crime. Evil does exist in our world. I’ve met it, spoken to it, even been threatened by it. We tell our children that monsters exist only in bedtime stories but they don’t. Monsters are out there; among us. Be prepared to meet them.

LJ: At what point in your law enforcement career did you realize you wanted to write instead? What was it like to make the transition?

Tom: The novel (trilogy) has been rolling around in my head for over a decade but I always figured I’d just write it when I retired. I never thought that day would come so quickly. I guess, like a lot of folks in that business, I hit a saturation point. I never saw it coming. Apparently the dark events in our lives can ferment until our soul can bear them no longer. I just wanted out. The problem was that my particular skill set is not very applicable in the civilian world. I had been a technical writer, not a fiction writer but it seemed like the right fit. Looking back I think it was fate.

LJ: Are you able to use specific incidents from your career in your fiction?

Tom: I’ve heard the term faction thrown around and I like it. A blend of fiction and reality. I’m very careful not to betray and confidences or divulge anything that might complicate any open investigations but that still leaves me a broad range of experiences to tap into.


LJ: What’s next for you? Are you working on another novel?

Tom: The Scent of Fear is the first in a trilogy and I am busy working on the second portion of the story which delves deeper into the motives of the serial sniper. I don’t want to give away too much but just as in The Scent of Fear there is a parallel story line of murder. I’ve always liked stories in which the protagonist must juggle different problems. I have to be careful not to overwhelm the reader with minutiae but real CSIs have to deal with many professional and personal distractions so why should our characters be much different?

FYI, Amazon Prime members can now check out The Scent of Fear free!