New York police say the suspect first arrived in the city on 24 November, in the busy run-up to the Thanksgiving holiday. He visited the Hilton Hotel, where the shooting would later happen, and his encounter with a clerk at the hostel, where he stayed, was captured on camera.

Luigi Nicholas Mangione, a 26-year-old Ivy League graduate from a prominent Maryland real estate family, had a gun believed to be the one used in last Wednesday’s shooting of Brian Thompson, as well as writings suggesting anger with corporate America, police said.