The person of interest in UnitedHealthcare CEO Brian Thompson’s killing has been identified as a 26-year-old computer whiz who graduated as valedictorian from his Maryland prep school.

Luigi Mangione, of Towson, Md., was carrying a weapon similar to the one used in the fatal shooting of Thompson when he was arrested in Altoona, Pennsylvania on Monday, New York City Police Commissioner Jessica Tisch told reporters.

“At this time, he is believed to be our person of interest in the brazen, targeted murder of Brian Thompson, CEO of UnitedHealthcare, last Wednesday in midtown Manhattan,” Tisch said at a press conference Monday.

The break in the case came from a Pennsylvania McDonald’s employee, who noticed as Magione was “sitting there eating” that he resembled the suspect seen on the New York Police Department’s wanted posters, NYPD Chief of Detectives Joseph Kenny said.

He had identification with his name on it, as well as a fake I.D., when he was taken in for questioning, law enforcement sources told the New York Times.

Person of interest in fatal shooting of UnitedHealthcare CEO Brian Thompson ID’d as Luigi Mangione, an ex-Ivy League student.