Family of UnitedHealthcare CEO murder suspect didn’t report him as police ask what they knew during manhunt

Blood is thicker than a viral surveillance image of a suspected killer grinning at a flirty clerk in the lobby of a New York City hostel.

Luigi Mangione, the former Ivy League computer science major now suspected of shooting UnitedHealthcare CEO Brian Thompson in the back in New York City has dozens of cousins in his prominent Maryland family. But none of them appear to have recognized him after his smiling face went viral in connection with a nationwide manhunt that ended Monday.

NYPD...