Dog Walkers

Detective Jack Mallory is back and on the trail of an elusive murderer with an unusual calling card.

When a body is found in a shallow grave with a dog, the seasoned detective hopes the animal's microchip will help him identify the victim. What he discovers sends shock waves through him. The chip identifies another woman-one who's gone missing.

Before the veteran detective can make sense of this baffling revelation, a second, then third victim is found with the same M.O.

Jack teams up with Det...