If that’s not what they were looking for, then...fruit of the poisonous tree.
Actually, he was allegedly part of a home-invasion robbery ring.
I’ve got problems with the fact that they allowed him to bleed to death while they were ensuring the home was secure. But they were legitimately serving a warrant for suspicion of being part of an armed home-invasion robbery ring, and were met by a man crouching, pointing a gun at them. Hardly the sort of “execution” that people are making it out to be.
It isn't going to be fruit of the poisonous tree.
One of the worst parts of the shift in law enforcement in recent years has been the release of statements that would taint a jury pool. It happens on both sides of the case, but the government has the duty to provide the accused with a fair trial. Many times the statements made about the accused can't win in court and aren't even brought up in trial. It is all about the prosecutors making a name for themselves.