Hiding in Plain Site

Was Chris hiding a secret identity that no one was able to see? Why was it only AFTER the tragedy that there is the big reveal? Why is it no one came forward to say "knowing him one could have predicted this. There were obvious clues"? Was there ANY way for anyone within these families to have seen what was about to happen? Could anyone have intervened? Were there clues that went ignored? Or was he just an expert at presenting to the world a nice guy image so that this was just imperceptable and only AFTER the fact did things come clear?