My sister has to attend a 302 hearing tomorrow morning about her bf.....?

she has had a 'stalker' for several months, turned out to be him, i suspected that all along but it was some crazy stuff, even went so far as to stab himself claiming the stalker did it, threatened her kids, broke windshields, tampered with brake lines, i'll kill you all messages and several other 'suspects' being pulled in questioned and accused by police. My question is....how should she handle it, how can she 'encourage' them to keep him longer, this guy obviously has serious issues and she is scared of what will happen when he gets out. He has been there since Saturday night, she found out he was the source of the messages and the police put him in. However, stalking is just a misdemeanor so even if they do bother to do the paperwork (which they probably won't in this town) it won't have anything much in the way of repercussions. any suggestion or information on these hearings would be greatly appreciated! t