SLA 2011: Crime Scene Investigation Philadelphia: Forensic Science Explained

Crime Scene Investigation Philadelphia: Forensic Science Explained
Gene Lanzillo – FBI Philadelphia
12 June 2011 10 am
slides via Google Slides maybe

never served a letter on a library
fbi lab -> one of the first that used evidence & science to solve crimes
gap between quantize & what was getting to the lab & perception
what the agents in the field collected wasn’t what the lab needed
the lab’s results weren’t what the field agents need
evidence response teams in a few places in PA
primary job was investigating national security cases, part-time on ert
philly is a rough town: 12 gunshots last night -> 1 self-inflicted (gun cleaning accident), 3 homicides
get coffee at pigano’s -> many clients are cops, fbi, …
32 agents, 2 support employees -> evidence control technician
this fellow manages the team, goes out on calls, etc. agents are part-time
he’s going to display evidence & have us talk about the photos
investigation is mostly mundane
40 hours of evidence training @ Quantico, Fredericksburg
explosives class -> blow up cars, sift through evidence, eat @ In & Out Burger later
photo of James face down w/ blood on the back of his head
read into scene what is there, not what you expect to see
Nikon cameras
white collar fraud + terrorism case last week -> small efficiency apartment, 200 photos
anecdotally, British police procedurals are more accurate than US procedurals
there’s one chance to do a scene do it right the first times
specific procedures for photographing: which angles, how many pictures, what gets photographed …
Locart’s prinicple: french forensic scientist: father of modern forensic science: whenever two objects come into content at a crime scene, they leave a little bit of themselves on the other object -> transference, trace
with the advent of DNA, a lot of procedures changed -> lots of DNA contamination
bag the hands -> tyvek or paper bags -> dried blood has a better chance of having good DNA than wet blood -> wet blood gets moldy quickly
libraries of shoe and tire impressions, weapons and ammo, toolmarks
450-455 nanometers of light makes blood visible, but begins degrading DNA after about 30 seconds, most cleaning supplies fluoresce
try everything: not all sampling works, get as much as possible, sent it to lab -> they can do better
yesterday’s technology tomorrow
fbi has 2 speeds: full speed ahead and full stop
ruvis ultraviolet light highlights fingerprints, drops background, good for busy patterns
sketching is still a very valuable way to capture crime scene information, can strip out some details to focus on what’s important, unlike some photographs
art skills are taught
he loves seizing computers -> hard shutdowns -> pull the plug
we all have expansive digital fingerprints
Hillary works on a blog called “In the library with a lead pipe” -> suspect because of committee name change controversy
human scent evidence is new, still controversial
polymerchain reaction to increase/extend DNA evidence

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