It happened around 10pm at the store on FM 646 near the Gulf Freeway.
Police say 41-year-old Roshanda Howard fired multiple shots at the victim before leaving the scene. The man was taken to the hospital by Life Flight but later died.
Howard was arrested after surrendering to police and admitting she was involved in a relationship with the victim.
Take ABC13 with you!
Download our free apps for iPhone, iPad and Android devices
