BrickLink - Set 7286-1 : LEGO Prisoner Transport [Town:City:Police] - BrickLink Reference Catalog
BrickLink - Part 3068bpb0486 : LEGO Tile 2 x 2 with Groove with 'DM 7287' on Blue Background Pattern (Sticker) - Set 7287 [Tile, Decorated] - BrickLink Reference Catalog
City | Police | Brickset: LEGO set guide and database