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Response to Union Label (Original post)

Mon Nov 9, 2015, 10:31 PM

10. NY Scrapped their program as well. (COBIS solved one case, and cost $44,000,000.)

The thing about a 'ballistic fingerprint' is that unlike the fingerprints on our hands, 'ballistic fingerprints' change with use of the firearm and cleaning. Fire 500 rounds of ammunition in an afternoon through a handgun, and the 'fingerprint' will have changed.

They're completely destroyed by replacing the barrel on the gun (a 5 minute procedure for many guns), something that many gun owners do to increase precision or to reduce wear and tear (like changing tires on a car.)

Matching a casing to a gun works when you find a freshly used gun on a suspect, and you have casings recently fired from it to compare to. With any length of use between the first point and the second, the 'fingerprint' match becomes inconclusive. Imagine a 'tire fingerprint' on your car as it rolls off the lot, and compare to the 'tire fingerprint' after 30,000 miles-- or after you get a new set of tires from Pep Boys.

The whole CSI / NCIS / Law & Order slew of tv shows have given folks an unrealistic expectation for the science of criminal forensics.

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Arrow 45 replies Author Time Post
Union Label Nov 2015 OP
sarisataka Nov 2015 #1
SickOfTheOnePct Nov 2015 #3
yeoman6987 Nov 2015 #7
Union Label Nov 2015 #14
X_Digger Nov 2015 #15
JonathanRackham Nov 2015 #26
sarisataka Nov 2015 #17
Eleanors38 Nov 2015 #37
NutmegYankee Nov 2015 #2
Amishman Nov 2015 #42
NutmegYankee Nov 2015 #43
onehandle Nov 2015 #4
sarisataka Nov 2015 #9
friendly_iconoclast Nov 2015 #21
friendly_iconoclast Nov 2015 #19
friendly_iconoclast Nov 2015 #20
GGJohn Nov 2015 #22
Lizzie Poppet Nov 2015 #35
mwrguy Nov 2015 #5
sarisataka Nov 2015 #12
GGJohn Nov 2015 #23
friendly_iconoclast Nov 2015 #24
pipoman Nov 2015 #31
Lizzie Poppet Nov 2015 #36
SickOfTheOnePct Nov 2015 #6
ryan_cats Nov 2015 #8
Duckhunter935 Nov 2015 #11
ryan_cats Nov 2015 #13
LineReply NY Scrapped their program as well. (COBIS solved one case, and cost $44,000,000.)
X_Digger Nov 2015 #10
JonathanRackham Nov 2015 #27
madville Nov 2015 #16
Kang Colby Nov 2015 #18
krispos42 Nov 2015 #25
liberal N proud Nov 2015 #28
Adrahil Nov 2015 #29
pipoman Nov 2015 #32
jmg257 Nov 2015 #34
krispos42 Nov 2015 #40
NutmegYankee Nov 2015 #41
krispos42 Nov 2015 #44
ileus Nov 2015 #30
TeddyR Nov 2015 #33
Brickbat Nov 2015 #38
Eleanors38 Nov 2015 #39
Straw Man Nov 2015 #45
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