PHILADELPHIA—More than 400 tips were called into the New York Police Department’s Crime Stoppers tip line during the five-day search for a masked gunman who ambushed and fatally shot UnitedHealthcare CEO Brian Thompson last week.
NYPD officials said about 30 of those tips were useful as information about the gunman’s movements before and after the Dec. 4 shooting. But it wasn’t until a 911 call came in from a McDonald’s employee in Altoona, Pennsylvania, on Monday that police zeroed in on their suspect.