An international warrant is out for a poncho-wearing rapper turned gunman who jumped out of a stolen Porsche and gunned down an underworld figure at a petrol station. One of the assailants wearing a poncho is Harley Johan, 31, who goes by the rap name YC EWZY. The two-minute video opens with a scene of masked gunman jumping out of a car and killing a driver as he pulls into an underground car park. The brazen attack was captured on CCTV and released by NSW Police on Thursday as they appeal for public help to identify the second gunman. The luxury car was later found alight in Kensington, with police believing the gunmen fled in another stolen white Audi hatchback.