Waived his Miranda Rights? Mistake number 2.
We all have friends who are lawyers. One of my best friends, easily the smartest one in the group is a tax lawyer and hates to go to court, but even he tells me "Don't ever say anything to the police. Keep your mouth shut". He tells me that if you refuse to speak to the police they will often threaten to take you to jail, but you will probably end up there anyway. Keep your mouth shut and your lawyer won't have to overcome the mistakes you made by talking to the police. By the way I have never seen the inside of a jail, so it is not like I have ever been required to follow his advice.
I have 3 neighbors (one is the County Sheriff) who are cops and great guys. I also have a good friend who is a cop. I think they have a tough job, but it only takes one bad apple to ruin it for the rest of them. We need to have a national directory for bad cops. Too many of them get fired from one job and move to another city or state and get another. We had one young woman cop (23-25 years old) who got fired for incompetence from the city I live in. I don't think she even made it through her probationary period before being fired. After a few months the neighboring city hired her. Shortly thereafter she was performing back-up for another officer who was arresting a dumb 19 year-old boy who failed to go to traffic court. He was in the driveway of his parent's house in the back seat of a 2-door car with a couple of friends, a boy and girl, in the front seat. As the girl in the front passenger seat was getting out of her seat so the boy could get out of the back, the young woman cop, Not the officer who was standing right next to the car, thought she saw a gun and fired multiple rounds into the boy. He dies at the scene. No gun and a dead kid. How tragic is that?