Trayvon had been suspended multiple times. There are pictures of him on the internet showing pot plants in his room, and him holding a gun and a stack of money. The police had caught Trayvon with burglary tools and some unidentified jewelry, after being called to the school for some 'problems'.
Trayvon's mom kicked him out and told him to go live with his father.
Trayvon's father was living with his 'girlfriend' Brandy Green.
Since it is unlikely that Tracy Martin (the father) was on the lease agreement, he was living there in violation of the rental agreement, and having Trayvon move in was a further violation. IF Trayvon got into any 'trouble', it would make this public and endanger Brandy Green's lease.
Apparently, Trayvon's death has pulled Trayvon's mother and father back together. My guess is that Brandy Green kicked Tracy Martin out so she wouldn't lose her lease. She seems to be nowhere around and Mother and Father are sitting together in court and making appearances together. Besides, they both have 'income' from TRAYDMARK (or whatever it is) and Tracy has a place to live again, so, you know, it's all cool.
Don't you mean "fiancee?"
By the way, the co-opting and corruption of that previously honorable word disgusts me.