All these latest revelations indicate that his death was cock-up rather than conspiracy because his death has revealed possibly criminal failings in the jail management they would very much want to have stayed hidden
Yes he was supposed to be checked every 30 minutes and wasn't but even if he had been it might well not have saved him as it takes well less than that to die of (self) strangulation
Should he have been on continuous suicide watch and regime? Well yes of course we know that NOW but was it unreasonable to have taken him off such as his own attorney's request? No
Some times bad things do happen without any conspiracy involved.