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| Oh stewardess, I speak jive.  |
Or just swap the barrel and firing pin, iffin you're gonna keep the pea shooter. | |||
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| Member |
would any residue inside the fired casing help to determine the make of the ammo ? either primer residue or powder residue or do all the ammo companies use the same powders for .38 spec and .357 mag? Safety, Situational Awareness and proficiency. Neck Ties, Hats and ammo brass, Never ,ever touch'em w/o asking first | |||
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| Member |
Why would it matter? (serious question) Knowing that it was EITHER a 357 or 38 to be on the lookout for would greatly narrow the field. Analogy: you find a dead body in the woods hacked up, pretty sure it a machete attack. Does it matter if you think its a parang, bolo, golok, or kukri-type machete? Not like you're going to let a likely suspect go because - he was found with a bloody golok and we 'know' the victim was killed by a bolo machete. ------------------------------ Proverbs 27:17 - As iron sharpens iron, so one man sharpens another. | |||
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| Freethinker |
I would be interested in a “yes” answer myself because that is not something I’ve ever heard of as providing useful information. The only information I’m aware of that’s related to the powder is the “stippling” that’s caused by grains of unburned powder. At close enough distances the powder will penetrate the skin or lodge in clothing, etc., and the degree and pattern of that phenomenon can indicate the distance from which the gun was fired. ► 6.4/93.6 | |||
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Corgis Rock |
Recall a "Law & Order" episode where the perp ran a round file down the barrel. They caught him with the gun but couldn't match the bullets. Then there was a "Perry Mason" episode where he swaps the barrels of two identical guns and confuses the police with "Which one is the murder weapon?" Just daydreaming, my Sig 226 started as a .22 and I bought 9mm and .40 X-Change kits. By record, I own a .22. Were one to commit a crime with the .40 kit, toss the barrel, then fit the .22 barrel... BTW, when you bury a body be sure to mound the dirt over it. Decay causes settlement and suddenly there's an obvious grave. “ The work of destruction is quick, easy and exhilarating; the work of creation is slow, laborious and dull. | |||
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Member |
They can determine the maker of the gun (number of groves and twist) from the bullet. The firing pin also leaves a traceable imprint but they need a fired case. Please do not tell us what you are planning. | |||
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| Member |
Again, if that were to matter they'd just have to look at the headstamp. Forensically speaking, the only time the make and model of ammo would come into play is determining the distance the gun was fired at the victim. Otherwise, the only forensic concern is determining if the bullet recovered from the victim/scene, or spent casing, is consistent with a round fired from a suspect's gun. "It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts." Sherlock Holmes | |||
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| Freethinker |
You put sneer quotes around “know,” but ultimately, that’s exactly what would happen if it could be conclusively determined that the implement the suspect had wasn’t the murder weapon. “Well, we can’t prove you did it, but we’re going to send you to prison anyway”—is that how you believe things work? How about, “The victim was killed with one shot to the head with a .22 caliber bullet that we recovered from his brain. You own a 44 Magnum revolver, so we’ll find you guilty because you own a gun”? Many people make unfounded assumptions about how criminal investigations work. Much of what detectives do, though, is to eliminate possibilities. If I were investigating a murder in which it could conclusively be determined that the fatal wounds were caused by 357 S&W Magnum cartridges with no possibility of any other, then yes, I’d concentrate on guns chambered for that round. Does that mean I’d ignore a suspect who was found in possession of a revolver chambered for 38 S&W Special? Of course not. The first thing I’d probably do would be to check the gun to ensure that magnum rounds wouldn’t fit in the chambers. Even then, not finding a suspect in possession of a known or probable murder weapon proves nothing. On the other hand, assuming by some chance we knew the murder cartridge had been a 357 Magnum, the suspect was found in possession of a gun that would fire that round, but we had no way of determining (through forensic examination) whether that particular gun had been the murder weapon, would his possession of the gun still be of some evidentiary value? Of course. Here’s a case: Someone is shot several times and dies. From the body is recovered a 0.355 caliber bullet with the same characteristics of those loaded in Speer 357 SIG Gold Dot ammunition. At the scene are several cartridge cases with Speer 357 SIG headstamps. The primers bear the distinctive Glock imprint and the bullet appears to have been fired from a Glock. The case is a true mystery, however, with no other clues or leads and goes cold. Three years later an informant tells the police, “Bill Jones did it. He used a Glock that he dropped off the 42d Street pier.” Divers recover a “357 Auto” Glock and the serial number matches one that Jones bought four years previously. The steel parts of the gun, however, are heavily rusted and ballistics comparisons to the recovered bullet and cartridge cases are impossible. Does the gun prove that Jones did the crime? No, but is it stronger evidence that Jones did it than if all we knew was that the victim had been shot to death and there was no indication of what cartridge or ammunition was used? Again, of course. The evidence might be weaker if the evidence was only a bullet that the firearms examiner said was usually only loaded in 38 Special cartridges and Jones’ gun was a S&W model 10 revolver, but even then there would still be some correlation and would help corroborate the informant’s claim about Jones and could help in obtaining a conviction. ► 6.4/93.6 | |||
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| Member |
I appreciate your experience. But spend some time reading about the NC SBI crime lab and you may find yourself inclined to dismount from your high horse. Crime labs have been known - proven - to play fast and loose with forensic evidence. http://www.newsobserver.com/ne...article10365422.html http://www.newsobserver.com/ne...article96900217.html FACT. Your other points are well-taken however. ------------------------------------- Proverbs 27:17 - As iron sharpens iron, so one man sharpens another. | |||
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Nullus Anxietas |
Under "F," yes?  "America is at that awkward stage. It's too late to work within the system,,,, but too early to shoot the bastards." -- Claire Wolfe "If we let things terrify us, life will not be worth living." -- Seneca the Younger, Roman Stoic philosopher | |||
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| Freethinker |
All I can say is that I have absolutely no idea what crime lab misconduct has to do with the present discussion. In any event I apologize for hurting your feelings; it was entirely unintentional.  If anyone else has questions about anything I posted I will be happy to try to explain. ► 6.4/93.6 | |||
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| Member |
curious as to why all the assumptions ? Safety, Situational Awareness and proficiency. Neck Ties, Hats and ammo brass, Never ,ever touch'em w/o asking first | |||
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