Darryl Usher, a reserve wide receiver and...

Darryl Usher, a reserve wide receiver and kick returner for the San Diego Chargers and Phoenix Cardinals last season, was shot to death at his apartment in Phoenix.

Police said a man entered Usher’s apartment and shot and killed Usher and Chiquita Burt, 24, believed to be Usher’s girlfriend.

The attacker, who was not identified, is in critical condition after apparently turning the gun on himself. He is believed to have been a former boyfriend of Burt.

The 5-foot-8, 170-pound Usher was signed as a free agent by the Cardinals last November after being released by the Chargers. He was not protected by the Cardinals Feb. 1 and became an unconditional free agent.

Usher, a second-year pro out of Illinois, was drafted in 1988 in seventh-round by the Patriots.