A 1984 shooting case reopens when a new witness comes forward; Lilly follows a lead into the gambling world.
The team investigates a house fire that claims a girl's life; a competitor at a gaming tournament ends up dead with an "S" tile lodged in his throat.
Costas thinks Sorenson will make a stronger witness than Sipowicz in the Cullinan murder trial; Russell and Kirkendall probe a home invasion.