IIRC, he went after his son's drug dealer in court.
Not sure what happened to the case.
I read O'Connor's autobiography "I Think I'm Out of Here"
Really kind of a let down.
I thought he'd have some great stories about All in the Family, but it was just mentioned in passing.
It was mostly about his acting philosophy, some mentions of his politics, "I don't know WHY someone would support republicans, they are so against what the working man needs (i.e.unions)".
But the biggest focus was on his son and how he died from drugs.
I think it broke his heart, and he was never the same.
Which is understandable.
The drug dealer was found guilty.