Things we know.
His house and the place where he worked were seemingly raided two years ago. From what we can tell, his actions were known for those two years, and he wasn't arrested. The reason why he wasn't arrested in that time is still unknown. Either they were building a case against others who were tied to it, or they were told to stand down. Personally, I think it's the former.
He's long been accused of molesting his younger sisters, and it didn't stop people from letting hi around their underage daughters.
Fuck every single one of those parents for knowingly allowing this predator around their kids.