I thought of a good way to kill someone

OK, first things first, you're gonna have to get your hands on some of their blood. Than you take that blood and freeze it, so it becomes a bloodsicle. Than you stab that bloodsicle into the person you want to kill's neck. And that will kill them. And than the blood will melt because the inside of people is hot. So there will be no murder weapon, and theres a good chance they won't be able to convict you. Of chorse the tricky part will be not getting the persons blood all over you in the process. But I'm sure you'll think of something.
Ohh... and don't kill people.