I see there already is a thread very much related to this subject

Thread: RFK Jr. met with Sirhan Sirhan in prison — now believes he’s a patsy & there was a 2nd gunman who killed his father Bobby Kennedy in ‘68!

This makes for the reason why nów, that I suspected

Prison is a place where convicts of a FF or anybody that can still say something is not right await their fate

Dead men tell no tales

If he ain't dead enough, he'll be back for a second take