WGN9 reported that Reyes-Hernandez and Orlando Perez came back to her home together at 5:30 a.m. on May 31.
Perez admitted to police on video that when he and Reyes-Hernandez arrived at her apartment in Chicago's Marquette Park neighborhood, he asked her whether she was a woman.
Reyes-Hernandez responded that she was trans, and Perez immediately left her apartment.
He came back 20 minutes later with a handgun and shot Reyes-Hernandez in the head and back.
He allegedly left shortly after shooting her but went back again minutes later to fire more shots, according to the Sun-Times.