HOUSTON, TX (KPRC) – Police have detained a woman they are calling a person of interest in connection with a deadly shooting of a 30-year-old man in the parking lot of a Houston area gym.

The woman, identified as Veronica Erin Staley, 34, was taken into custody Wednesday morning. Police said she is the ex-girlfriend of the victim, Aljosa Memovic, 30.

According to homicide investigators, security cameras show the woman sitting in her car in the parking lot for more than an hour before the shooting. The victim parked his car in a lot on the other side of the building and walked up to the woman’s car.

“She immediately pulls out a gun and fires on him, at least three shots,” Sgt. Matthew Brady, of the Houston Police Department’s homicide division, told KPRC-TV. “He starts to run across the parking lot behind us. She chases him with gun in hand.”WATCH: Raw video seconds after the shooting

Witnesses say the woman chased the man across the parking lot until he collapsed, then fired at least two more shots at him. Apparently out of ammunition, she then used the gun to pistol-whip him before sprinting back to her car and speeding away.

“We don’t know anything about the relationship between the two. It doesn’t appear random; it appears he probably knew her,” Brady said.

The victim was shot multiple times and died during surgery at the hospital.Read more: http://nbc4i.co/1qufH3p