Yes, yes, yes, but, cocaine and the sense of doing the "illegal" things, was perhaps a contributor to the group sex venture? The deterioration goes down hill in a hurry when you are under the influence of drugs and sex/jealousy ?
Who knows, anyone could make any guess. We don't know enough about their lives to make any valid assessment.
The original point was that this guy had problems in the first place, and shouldn't have even been a cop because of the depression and medication. Someone else brought up an argument that the cocain was the cause of all this. It seems both the cop and his wife were leading lives that were a little odd.