Suspect, who mentioned company in note found during arrest, may have targeted it because of its size and influence

There is no indication the man charged with killing UnitedHealthcare CEO Brian Thompson was ever a client of the medical insurer and may have targeted it because of its size and influence, a senior police official said Thursday.

Joseph Kenny, chief of detectives for the New York police department, told NBC New York in an interview Thursday that investigators had uncovered evidence that Luigi Mangione had prior knowledge UnitedHealthcare was holding its annual investor conference in New York City.