No he doesn't deserve to have his life threatened. What would make you think that whatever a person SAYS should endanger their life?...
Four thugs using robbery for their occupation. What could go wrong there? Momma's all say that they're good boys though.
$5000 might make a few of the roaches he hangs with come out to collect. Snitches get stiches unless there's money involved.
Why no description of the perp?
They should treat all violent prisoners like the vermin they are. Ship them to an island and let them fend for themselves.