From how I understand it, yes. Evidence obtained from the execution of another crime can be used as long as law enforcement didn't participate in the crime. The protection from illegal search and seizure is to protect civilians from the government, not other civilians.

whomod said: I generally don't like it when people decide to play by the rules against people who don't play by the rules.
It tends to put you immediately at a disadvantage and IMO is a sign of true weakness.
This is true both in politics and on the internet."

Our Friendly Neighborhood Ray-man said: "no, the doctor's right. besides, he has seniority."