The New York Police Department has released new photos of a suspect wanted in the killing of UnitedHealthcare CEO Brian Thompson. The images show the person in a blue medical mask and dark clothing, captured in a New York City taxi and walking near a vehicle. Authorities have yet to identify the person of interest in Thompson's killing, according to sources. A $60,000 reward is offered for information leading to his arrest. Thompson was fatally shot Wednesday in what police described as a premeditated attack outside the New York Hilton Midtown hotel.