They don’t need to get into their heads.
All they need to do is over-charge the one that was the least involved and he will rat-out the next guy, and he will rat-out the others.
It's immoral for the government to over-charge anybody. I can't believe anybody would support such a tactic.
Perhaps in the future the government will charge you with a crime in hopes that you may have seen something happen. Good luck having to defend yourself against something that you didn't do.