Luigi Mangione is believed to be a person of interest in last week's deadly shooting of UnitedHealthcare CEO Brian Thompson, police said Monday. The 26-year-old was arrested on firearms charges in Pennsylvania, where New York police detectives were heading to interview him amid a massive manhunt for the shooter.

Luigi Mangione's defense attorney said he has seen "no evidence" linking his client to the killing, adding that "a lot of guns look the same."

Tisch also said the NYPD matched Mangione’s fingerprints to those found on a water bottle and a protein bar wrapper near the scene of the killing.Start the day smarter. Get all the news you need in your inbox each morning.