I used to think that but then I remember people like Josef Mengele, who after torturing to death many people including children went on to live a full happy life and have his own family and children. He did drown but only when he was an old man and had lived his life. Or the UKs most prolific pedophile Sir Jimmy Saville died of natural causes as an old man and had even been knighted by the Queen! He was oblivious at the time of death that his pedo past would eventually be uncovered.

Edit: Also Bill Ayres and Susan Rosenberg seem to be doing alright for themselves after bombing the capitol building in the 80s