i recently found out from my mother that my brother is facing charges of possession of child pornography. i'm not really sure what to do. he and i have a complicated relationship to say the least; he's a veteran and graduated college and is in a conventional heterosexual long-term relationship and has never had troubles finding employment. meanwhile i am mentally ill (bipolar, borderline, PTSD, anxiety), dropped out of college, and was homeless for a very long time. also i'm bisexual, which wouldn't matter so much since i'm with a man now, but i'm still very "butch" and this matters to my mother, because she is keen on appearances. i used to live with them once as an adult, because i was homeless and had come down with thrombocytopenia (low platelet count) but my brother and i had such problems due to his violent and aggressive behavior that i was forced to leave and get back out on the streets for my personal safety. i thought everything with him was going fine but then she tells me about the child pornography charges. since then i've had trouble sleeping, don't like going outside anymore, don't really talk to friends... this is all i think about these days, and it scares me because i don't know what will happen if he goes to prison, i'm scared he'll join a group of some sort and then come back and try to kill me. he already tried to choke me before a few years ago, and that's why i don't attend family functions. i used to e-mail with my mother and pretend like everything is okay, but this stuff with my brother made things too tense. at one point during the holiday season, because i was stressed, i sent her an e-mail calling her out for always covering for him, about not preventing the abuse and attacks from a few years back, and i know it's important to be in the present and not stuck in the past, but i got sick of always being the "nice one" and feeling like a doormat all the time. she got mad at being told off, and she told me not to e-mail her anymore until i think before i speak... she defriended me on social networks, all these things. it just seems like he is always the favorite, and although i am grateful for his military service i'm sick of that being used to manipulate people into thinking he is a good person. i'm sick of the fact that she told me not to tell anyone about these charges against him. she is enabling him. he's an adult and she treats him like he's royalty.
i guess i'm wondering, am i being too judgmental here? am i justified in cutting ties with both of them? i feel like it's become an unhealthy relationship, and though i understand the role family plays in one's life and the gratitude necessary, i also feel like it would be better for my anger and my own mental illness that i no longer speak with them.
someone tell me what i should be doing, i feel like all of this is my fault. all i want is to leave town and forget i ever had a family, or just sleep forever. help.