Via Fox News:
The mother of a gunman who ambushed and murdered two NYPD officers as they sat in their squad car Saturday afternoon in Brooklyn told authorities that she was scared of her son and he had a troubled childhood, often acting violent.
New York City Chief of Detectives Robert Boyce told reporters Sunday afternoon that 28-year-old Ismaaiyl Brinsley, who approached the passenger window of a marked police car at approximately 2:45 p.m. local time and opened fire — striking Officers Rafael Ramos and Wenjian Liu in the head — had numerous run-ins with law enforcement.
Brinsley has been arrested 15 times in Georgia, and four in Ohio for assorted crimes, Boyce said. In posts on social media, the gunman expressed anger against the United States government at himself, Boyce added.