After watching a YouTube video that detailed the situation and environment he was in (a horribly mismanaged overcrowded correctional facility), I think he did kill himself because he knew he was fucked and was going to live the rest of his life as far removed from the lifestyle he was accustomed to as possible. He had already tried to kill himself previously. The people watching him are among the staff that are over-worked and have to maintain order in an already overcrowded facility... yeah, there will be gaps in observing him.
However, regardless of whether he killed himself or not, the rich are always keeping their best interests first at the expense of others. The real crime is that they're killing us, just much slower.