cold show
n.β Β«Salkowitz identified the thief without exposing herselfβMorgante says thatβs called a “cold show”βand the suspect left personal items in the vehicle, conveniently tying him to the scene.Β» ββWoman starts day crime victim, ends it crime solver” by C.W. Nevius San Francisco Chronicle (California) Apr. 8, 2006. (source: Double-Tongued Dictionary)