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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A lot of people here talking about guns, because well, guns are what are mainly used for murder in the states. A big part of that is because guns are cleaner and more efficient even from distance. Knives you need to be up close. Unless you are slicing someone’s throat from behind, knives are extremely messy with blood everywhere. If you use a knife to stab someone, you will have to do it multiple times, because a single stab wound might not be fatal. Each of those stab wounds will spurt out blood when the knife comes out. Also, knives are made for slicing for the most part, not stabbing. Buy a big cut of meat and take out a knife and try to stab it. Actually don’t. Because if you do, you will find another bad thing with stabbing which is that since the knife isn’t made for stabbing, it will be hard to get it in. Thanks to the laws of motion, when the knife hits the other person’s body, it’s going to slow down some, but your hand in the stabbing motion will be moving at the same speed, so your hand is going to slide down the knife, and you will almost certainly cut your hand as well. Since you are going to be stabbing the victim multiple times, and you probably aren’t feeling the cuts on your hand due to adrenaline at the time, each time you stab, that cut in your hand from getting sliced by the knife will get deeper. That’s a pretty distinctive mark to look for on a suspect.
Also look at the construction of most knives. It is a metal blade that has two pieces of wood or metal or plastic bolted together on the on to form a handle. You won’t have tools to take that knife handle apart, but investigators will. Even if you wash the knife thoroughly, given all the blood with a stabbing, you will likely still leave some blood down in the handle. How are you going to explain owning a knife with the victim’s blood embedded inside the handle? Especially when you also have a wound on your hand that can only come from stabbing with a knife?
Lastly (since I didn’t see other people mentioning this), knives especially are cheap to replace. Even a high quality chef’s knife is only a couple hundred to replace, but most kitchen knives would be much much cheaper. Even a handgun would only be a few hundred to replace. Is it worth saving a little bit of money to keep evidence that directly ties you to a murder?
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