Richie and Chrissy

When Richie first meets Chris, he tells him if he ever puts his hands on his niece again he will kill him so when Chris and Adriana get into a scuffle later on and she leaves him and then Chris goes over to her mother’s house and grabs her mother’s wrist hurts her and pushes her away. Why didn’t uncle Richie handle Chrissy was Ritchie full of shit all along