Investigators have begun to piece together the actions of a man they believe killed a health care executive on a city ...

A manhunt continues for the still unidentified gunman who shot and killed UnitedHealthcare CEO Brian Thompson outside a ...

New clues emerged Thursday in the hunt for the masked gunman who stalked and killed UnitedHealthcare CEO Brian Thompson, ...

The NYPD is desperate to find him. Corners of the public hope they never do, and some digital sleuths that usually step up ...

As the investigation into a masked gunman who stalked and killed the head of one of the largest U.S. health insurers moves ...

The man accused of gunning down a health insurance executive in New York was found with a handwritten manifesto laying out ...

A suspect is on the loose in what police called the "brazen" targeted attack of Brian Thompson, the CEO of major insurance ...

Nearly four days after the shooting of UnitedHealthcare CEO Brian Thompson, police still do not know the gunman’s name or ...

New York police officers on Friday found a backpack in Central Park that they believe was carried by the man who fatally shot ...

While police have found some key pieces of evidence, the identity and location of the man who fatally shot UnitedHealthcare ...

New video obtained by ABC News shows UnitedHealthcare CEO Brian Thompson's killer waiting for him moments before last week's ...