Disturbing video shows moment beloved activist, poet is randomly stabbed to death in front of girlfriend after they attended wedding together

Disturbing new video shows the moment a big-hearted activist and talented poet was randomly stabbed to death in front of his girlfriend, who desperately tried to get help in the aftermath of the harrowing attack in Brooklyn.

Ryan Carson, 32, can be seen sitting on a bus stop bench in Bedford-Stuyvesant and speaking with his girlfriend as the two made their way home from a wedding on Long Island just before 4 a.m. Monday, according to the surveillance footage.

Wearing a gray suit, Carson and the young woman, dressed in...