New Tricks (2004)

S4E6 Buried Treasure

Brian's dog unexpectedly uncovers a body, leading two individuals to admit to murder. However, they soon learn that the remains are actually over 600 years old. This revelation sends Sandra, Jack, Brian, and Gerry on a quest to unravel why these two would confess to a crime they clearly couldn't have committed, and whether they might be behind other murders. Meanwhile, Strickland is eager for them to tackle an even more puzzling case that hits closer to home.