The man charged with killing UnitedHealthcare CEO Brian Thompson was never a client of the medical insurer and may have targeted it because of its size and influence, a senior police official said Thursday. NYPD Chief of Detectives Joseph Kenny told NBC New York in an interview Thursday that investigators have uncovered evidence that Luigi Mangione had prior knowledge UnitedHealthcare was holding its annual investor conference in New York City. Mangione also mentioned the company in a note found in his possession when he was detained by police in Pennsylvania. “We have no indication that he was ever a client of United Healthcare, but he does make mention that it is the fifth largest corporation in America, which would make it the largest healthcare organization in America. So that’s possibly why he targeted that that company,” said Kenny. Mangione remains jailed without bail in Pennsylvania, where he was arrested Monday after being spotted at a McDonald's in the city of Altoona, about 230 miles (about 370 kilometers) west of New York City. His lawyer there said he hasn't seen any evidence yet linking him to the crime.