They beat me for two days straight in the first police station that I was in. I hadn't slept or eaten or had water for 48 hours and then I was forced to sign a big stack of documents
Doubt.
Court documents indicate that this worked at least to some extent, earning him a four-year sentence.
Where? There's no citation.
"We were banned from showering or cleaning ourselves, sometimes for months at a time. Even the toilet could be used only at specific allotted times, and they were filthy - waste from the toilets above would constantly drip down on to us."
Doubt.
I highly doubt that a prison supposedly only housing foreigners (news flash, it doesn't as per a 2009 NY Times article on a chinese "dissident") would have US/Israeli conditions. The lack of any primary documents indicates this.
This is likely a completely fabricated story, on the level of social credit scores