Livery cab drivers are having a hard time lately. Three of them have been shot dead in two weeks, and the recently-apprehended subject in the robbery-murder of driver Amadou Ndiaye was caught trying to rob someone else. Now police are looking for a crew that robbed a livery driver on August 19 on Park Hill Avenue in Staten Island at gunpoint. The three suspects are believed to be in their late teens, and are shown here on surveillance tape subsequent to the robbery. If you have information as to these men or this incident, NYPD asks you to contact 1-800-577-TIPS(8477), www.nypdcrimestoppers.com, or text 274637 (CRIMES), then enter TIP577.