Brother is a pervert.?

My little brother is almost 20. His whole life he was bad mouthed and riducled and I was the single person to stand up for him. I thought we were very close. On Thanksgiving of 06, 8 months after one my baby's ped away(this has little to do with it) he tries to molest my then 3yo son. Thankfully, things didnt get far enough for my son to be truly traumatized. Now, my mom tells me he has been caught with 18 counts of kiddie . Though he will only be charged with one count. No jail time, just probation. I can almost not handle this. Im still aching over what happened 3 years ago. Ive also lost a brother in this mess and over something I know will keep it over forever. Even though hating him makes a ton of sense, it still hurts. I worry about if he hurt my other little nephews(maybe my neice,too). I worry about other small children he may have run into in person. I hate how my brother was looking at pics of small children wo had no say in this abuse. I hate how he is a part of this.My dad doesnt know I know. My mom feels in"bad" for my brother but also knows how wrong he is. But I guess as the mother, its tough to sort through these things. But I have a hard time being understanding since my son was a victim. I dont know what my question is exactly but I know Im asking something,.