In The Doctor Feelgood Mysteries, our hero, Dr. Feelgood, investigates suspicious deaths due to drugs. But because he’s always prescribing lots of dangerous drugs to people on the sly for extra cash, he’s always the guilty party, so he has to railroad someone else for the death, like some low-level regional drug dealer he knows about from his druggie clients, or some low-level doctor who’s on to his elicit activities. And he always gets away with it, filling the prisons with innocent people, and killing them during routine medical exams when they’re about to be released from prison. (<He’s also the local volunteer prison physician) And being married to the Commissioner’s daughter doesn’t hurt his position either: as long as she’s happy with all the extra gifts, he’s beyond suspicion!
(This was inspired by The Doctor Blake Mysteries. Dr. Blake, for those who don't know, is always drunk or high or accusing innocent people of stuff and looking like a jerk. In fact, in last week's episode he didn't have adequate time to test some confiscated drugs the police had as evidence, so he just took them to see what would happen, and he got super wired. Then, since they had no evidence to charge the person in custody, he went and bought some more from a drug dealer to "replace" the evidence. Of course, he solved the case, but only in a script can someone do stuff like this and keep their job.)