Body Of Proof - Buried Secrets

A really clever little episode which starts of differently to the way it ends, not what you thought the story was about.  It starts with a woman who is overtired, driving home from her shift when she accidentally runs over something in the road.  The next morning, it is revealed the woman had run over a man, a police officer.  However, as usual, things are not as simple as they appear.  Megan starts to investigate and discovers that the man was already dead and that it appears he was poisoned.
Was it the drug dealer that had lodged a complaint against the cop?  Or is it related to the cold case he has been working on, searching for the killer of a high school girl?
Megan has to go to her Mother, Judge Joan Hunt played by Joanna Cassidy, to get permission to resume the body of the dead girl.  (Clever way of finding the killer but I really would have thought the body would have been more decomposition after all that time?).  At the end of the episode, she returns to her Mother to get permission to resume her Father's body, but her Mother denies her request.
Another great episode.