The Diamond Trap (1988)

When streetwise Manhattan police detectives Rawlings (Howard Hesseman) and Brendan Thomas (Ed Marinaro) discover a major diamond heist is about to go down at a renowned gallery, they enlist one of their suspects, gallery employee Tara Holden (Brooke Shields). But an attempt to foil the robbery explodes with deadly consequences for Tara. Committed to break the case, Rawlings relentlessly pursues the clues through a twisted maze of deceit and danger that takes him to England, where he and Scotland Yard detecive Charlie Lawson expose the ultimate con and solve the crime.