Police identify Luigi Mangione as a “strong individual involved in the assassination of the CEO of UnitedHealthcare.”

CEO Brian Thompson, 50, was shot outside New York’s Hilton Midtown around 6:45 a.m. Dec. 4 as he was on his way to speak at UnitedHealth Group’s investor conference.

Police said the gunman appeared to have been waiting for his intended target in what New York Police Commissioner Jessica Tisch called a “premeditated, pre-planned targeted attack.”

The masked gunman approached Thompson from behind and shot him at least once in the back and once in the right calf. Police said the words “deny,” “delay” and “depose” were written on the shell casings found at the scene.

From there, the shooter fled on foot and then by bicycle into Central Park, the New York police said. The last images of the suspected shooter were taken in a bus depot in Upper Manhattan.