Here's the official description for the June 23rd installment of Rookie Blue titled "Two Truths and a Lie".
THE OFFICERS OF 15 DIVISION SEARCH FOR A KILLER, LEADING THEM TO SOMEONE WITH A SURPRISING CONNECTION TO SAM SWAREK
After the grim discovery of a missing man's body in the trunk of his car, 15 Division must try to find out what happened to Brian Gowdy - a high school teacher with no apparent enemies. While trying to track down their prime suspect, Andy and Sam go on the road to interview a list of prison inmates, leading them to someone with a surprising connection to Sam. Meanwhile, back at 15 Division, Traci leads the investigation and realizes they may have the wrong suspect.
Missy Peregrym as Andy McNally
Travis Milne as Chris Diaz
Gregory Smith as Dov Epstein
Charlotte Sullivan as Gail Peck
Matt Gordon as Officer Oliver Shaw
Ben Bass as Detective Sam Swarek
Enuka Okuma as Detective Traci Nash