Why did DeNiro's character turn rat. I don't remember them ever saying why he turned rat. He may have been evil but he was afraid to leave his family and going to jail?

His kids and his wife were kind of like him in their own way. He would put them in danger for what?

He would do something like tell his hot wife and kids not to ever visit him in jail. Think of him as already dead. Tell his wife to divorce him and find someone new.

So canT under stand why he would rat out his friends.

So that is why I did not like the movie.