When the episode begins Beau Felton goes to visit Chuckie Prentice that has his father Harry (Wilford Brimley) bed-ridden, doesn't want to live anymore and has hired a suicide doctor, in fact when Harry overhears Felton saying Chuckie to stop this nonsense becomes cranky. However some days Chuckie manages to shoot his dad with a gun that was in the room. When Lewis and Crosetti go investigate, Chuckie claims that Harry shot himself but the two don't believe it. Eventually Felton would end up helping Chuckie getting away with murder.
Pembleton and Bayliss are called to investigate the shooting of Charles Courtland Cox, a drug dealer found shot in the back after a visit by the police in his house. After a discussion with Giardello, Pembleton manages to make the firearms of all the officers in the unit tested for finally finding out the real shooter of Cox, and is found just before the end credits roll.
The main reason why I gave a high score is because in the first story they were dealing with assisted suicide which is an issue that afflicts people to this day (30 years later actually as I am writing this) and I liked that Felton helped his friend getting away with it so easily. As for the rest, among the best episodes of the show so far, and that might be a compliment.