I changed my vote to "Murder or Suicide both sound possible" from just suspecting suicide.
The nature of his broken neck, and the way that the initial excuses have snowballed (similar to lies the Trumps told about the Trump Tower meeting) are incredibly suspicious. First, they said the guards were on major overtime, so they were exhausted. Then, we were told they simply violated protocol by not checking on the half hour timetable. Then we were told they somehow didn't check his cell for hours despite doing other duties. Then we were told they were asleep the whole shift, and falsified those records!
Incidentally, we were told he was taken off suicide watch just days before the incident despite that he already attempted suicide just six days earlier when there was no reason to believe his mind would have changed under these conditions. Oh, and conveniently, his cell mate had been transported out just before they deliberately didn't check his cell. Also conveniently, turns out there won't be any video of his suicide! Cameras didn't capture it!
Jesus Christ. That's too many coincidences for me. Either he paid them off to facilitate a window where he could kill himself, or he was straight up murdered.