eli5 why would you want to get rid of the weapon used in a crime?

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For example if you use a gun to kill someone how could the bullet possibly be linked to you thousands of guns use the same caliber or a knife even though you would feel terrible looking at the knife wouldn’t it make more sense to just clean it and continue to keep the knife in your home so it make sense that your dna is on it? in movies people always feel the need to get rid of the weapons but i think it would make more sense to keep it unless there’s something i’m missing

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Anonymous 0 Comments

To “prove” a murder, you classically need 3 things: means, motive, and opportunity. If I can establish that you wanted to kill someone, you were able to kill someone via the means by which they were killed, and you had the opportunity to kill them at the time when the person was killed, then a competent prosecutor can convince most juries out there that you’re the murderer.

Having the murder weapon goes a long way towards establishing “means.” Suppose the victim was killed by a .44 handgun, and you are found in possession of a .44 handgun. If you also wanted the victim dead and you were at the scene of the crime when the murder took place, you’re going to have a mighty hard time convincing a jury that you didn’t do it. However, if the gun was never found, then there’s a lot more reasonable doubt that you were the killer.

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