The team searches for more clues after the Uzi from the shootings is found in the church, but the bad blood between Hickman and Tao reaches the boiling point. Meanwhile, more clues indicate that Rusty's mom may be in danger.

A major figure in the case is dead from a suspected overdose, but Tao thinks he was murdered. A major revelation casts Mark Hickman's motives in doubt, and a new suspect emerges on the day of the memorial service for the original victims.

The team has a new theory about the mysterious third gunman in the original shooting, which leads them to the discovery of who's dealing drugs out of the church. Meanwhile, the team discovers that Rusty's life has been threatened.

Sharon finally untangles a Gordian Knot of cocaine, religious zeal, jealousy, corn starch, nicknames and chop shop activities to identify the perpetrator of seven murders. Provenza ties the knot. Rusty faces his abuser.