Aaron Locklear was a 30-year-old security guard who was shot while on duty at the Riverdale Osborne Towers in the Brownsville neighborhood of Brooklyn on November 28, 2014. A man later identified as 20-year-old Antonio Mahon of Queens fired at Locklear and his colleague, James Merced, reportedly believing they were people he had a prior dispute with. Locklear was struck in the neck and remained on life support until his death on December 4, 2014. Merced was shot in the back and was left paralyzed from the waist down.

After initially remaining without a suspect, investigators traced apologetic letters sent to the victims families back to Antonio Mahon. He was arrested on January 9, 2015, and in an interview admitted to carrying a gun and to the shooting. Mahon was charged with second-degree murder and multiple other counts, and later convicted of murder, attempted murder, and additional charges.