Say this for Aaron Hernandez: He follows all the rules of the Bristol County House of Correction. That’s the word from Bristol County Sheriff Thomas M. Hodgson, who told the Boston Globe that Hernandez has been a model inmate while awaiting trial on a charge of first-degree murder. “He’s been nothing but perfect,” Hodgson said. “I met with him when he first came in to lay the rules out. I said, ‘Here’s the deal. You won’t be treated any better or worse or get any special privileges here. If you have any issues or problems, tell command.’ He was very polite and very respectful. He didn’t seem nervous, he seemed very comfortable.” Hernandez is separated from other inmates because, Hodgson says, there are concerns that other inmates could attack him to raise their own profile. That means Hernandez lives in a 7-foot-by-10-foot cell for 21 hours a day. When he is allowed out to exercise, it’s not like he can do any running: Even then he’s confined to an 8-foot-by-12-foot cage. He does pushups, situps and squats. Hernandez doesn’t have access to a TV but he does have access to books and can write letters. He is allowed to have visitors for one hour each week. The jail declined to comment about whether any of Hernandez’s Patriots teammates have visited.