Suspect in the killing of UnitedHealthcares CEO faces weapons, forgery and other charges [Video]

Police arrested a suspect Monday in the brazen Manhattan killing of UnitedHealthcare’s CEO after a quick-thinking McDonald’s employee in Pennsylvania alerted authorities to a customer who was found with a gun, mask and writings linking him to the ambush.

The chance sighting at the restaurant in Altoona led to a dramatic break in a challenging but fast-moving investigation that had captivated the public in the five days since the shooting that shook the health insurance industry.

The suspect, identified by police as 26-year-old Luigi Nicholas Mangione, 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. He was charged with weapons, forgery and other charges.

Mangione was sitting at a table in the rear of the McDonald’s wearing a blue medical mask and looking at a laptop computer, documents said. When an officer …