"Making a Murderer" star, and controversial convict, Brendan Dassey's lost all hope in his new prison -- he will not get to see his favorite show, WrestleMania ... TMZ has learned.
Dassey transferred to Columbia Criminal Institution in Wisconsin in January, and prison officials tell us there's a strict rule against violence, foul language and nudity for TV viewing. That means the WWE's main event is off the table, so avid wrestling fan Dassey is screwed.
If you watched 'Murderer,' you'll recall Dassey's main concern after getting arrested for homicide in March 2006 .