Shane Tamura killed four people at a Manhattan office building Monday, including Blackstone executive Wesley Lepatner and New York City police officer Didarul Islam. The head of the NYPD said investigators plan to question a man who supplied parts for the gun that was used in the attack.

Officials said the gunman fatally shot himself after his attack, which set off a chaotic scene that rippled out into the heart of Manhattan during rush hour.

James Andrew McGann is the suspect in the Devil's Den State Park double homicide of two married hikers in Arkansas. That's according to the Arkansas Department of Public Safety, which announced McGann's arrest on July 30 in the murders of Clinton and Cristen Brink, who were murdered while hiking ...