Rock Hill police need your help in its investigation of a hit-and-run last night that sent a motorcyclist to a Charlotte hospital with life-threatening injuries. Executive Officer Mark Bollinger says an early 2000s champagne-colored Infinity ran into the motorcycle about 9:00 last night at the intersection of Celanese and Mount Gallant Roads in Rock Hill. Bollinger says officers located the vehicle that struck the motorcycle at the 2200 block of Farlow Street in Rock Hill. He says two persons of interest are being interviewed by investigators. Anyone with information about the suspects are urged to call Crimestoppers at 1-877-409-4321.