[direwolf20]

There is no trace from a dead body back to the original act of killing, but police regularly manage to link them anyway (at least when the body had a large enough bank account).

They do this by means such as "questioning people" and "finding evidence". For example, if you have a file on your computer describing your plan to use XOR to infringe copyright, that would be considered "evidence".

[amelius]

This steps over the fact that the first crime is considerably messy while the other is extremely clean and can be committed where the law cannot see without a warrant.

[moi2388]

Ha, but the neat trick is that I instead posted this on a distributed system that.. hey, wait a minute..