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

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

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

Fingerprints belonging to the man charged in last week's murder of UnitedHealthcare's CEO match those found on a water bottle ...

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

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

The gunman who stalked and killed UnitedHealthcare CEO Brian Thompson fled New York City by bus, police officials told CNN on ...

Luigi Mangioni, the suspect in the killing of UnitedHealthcare CEO Brian Thompson, wrote online of the “devastating” effect a chronic back condition had on him as a young man.

The man charged with killing UnitedHealthcare CEO Brian Thompson on a Manhattan street was seen near a Port Authority bus ...

Fingerprints belonging to the man charged in last week's murder of UnitedHealthcare's CEO match those found on a water bottle recovered not far from the scene, sources say.

During an extradition hearing in Blair County Courthouse in Hollidaysburg, Pa., on Tuesday, Luigi Mangione's defense attorney ...