In the video, the unidentified assailant — clad in a black hoodie, black pants, gloves and wearing a gray backpack — can be seen methodically firing what appears to be a single-action handgun at

UnitedHealthcare CEO Brian Thompson, 50, was shot dead outside on Sixth Avenue in Manhattan, New York, before an investor meeting - with his shooter still on the loose

Video has emerged of the moments before the murder of a top healthcare boss on a New York City street in what police believe was a targeted hit. Brian Thompson is shown walking in Manhattan when the killer appears from behind a car and raises a gun - believed to have been fitted with a silencer - from about 15ft.