New details on suspect in UnitedHealthcare CEO killing as police track down evidence

Investigators have “reason to believe” the suspect in the shooting of UnitedHealthcare CEO Brian Thompson has left New York City, as he was seen on video entering a bus station after the killing and never leaving, the city’s chief of detectives told CNN. Officials believe the gunman “definitely planned this out,” waiting for Thompson outside a conference at a hotel. Catch up on the latest with CNN's reporters and analysts: 0:00 A backpack believed to belong to the suspect in the killing of UnitedHealthcare CEO Brian Thompson has been found in Central Park, a law enforcement official tells CNN. Erin Burnett and Omar Jimenez report. 4:28 Retired NYPD Detective David Sarni, former senior FBI official Katherine Schweit, and Boston Police commissioner during the 2013 marathon bombing and manhunt Ed Davis join CNN’s Erin Burnett to discuss. 12:17 Expert in facial recognition technology and president of IDEMIA Group Donnie Scott talks with CNN’s Erin Burnett about the images of the suspect in the shooting of UnitedHealthcare CEO and if facial recognition technology could be used to identify him. 16:50 Investigators are looking into the possibility that the gunman who killed UnitedHealthcare CEO Brian Thompson may have used what is known as a veterinary gun, a larger firearm used on farms and ranches, Joseph Kenny, New York Police Department chief of detectives, told The New York Times. CNN’s Anderson Cooper reports. 19:21 CNN’s senior Crime and Justice correspondent Shimon Prokupecz speaks with NYPD Chief of Detectives Joseph Kenny and New York City Police Commissioner Jessica Tisch, who shared details on the investigation. 23:31 A panel of experts joins CNN’s Anderson Cooper to discuss the details that the gunman who killed UnitedHealthcare CEO Brian Thompson may have used what is known as a veterinary gun. #CNN #News