January 14, 2021 Dashcam footage shows officers racing downhill after an empty police van rolled backward for about 100 metres on Wednesday, hitting three other vehicles. Facebook An empty Hong Kong police van slammed into three other vehicles and sent three people to hospital on Tuesday afternoon as it rolled backwards for about 100 metres after being parked on an uphill section of Central’s Cotton Tree Drive. The crash in the Mid-Levels area occurred shortly before 2.30pm when three officers exited the vehicle to handle a traffic accident involving two cars near the junction with Kennedy Road. “Just after officers slammed the door, the patrol car began moving and rolling backwards. Officers tried to jump into the vehicle in vain,” a police source said.