A $5,000 reward is being offered for information on the third person involved in a shootout with diaper theft suspects at an Orange County Walmart store. 

Deputies said a Walmart customer opened fire on Saturday morning on shoplifters who were stealing diapers from the store in the 5500 block of Clarcona Ocoee Road. 

WATCH: Scene from the Walmart shooting

Investigators said 19-year-old Arthur Adams was hit multiple times and died at the hospital.

The gunman told investigators he fired because he thought one of the shoplifters was reaching for a weapon.

A second victim, only identified as a juvenile female, was hit in the leg, deputies said.

The Orange County Sheriff’s Office learned about the girl hours after the shooting when she went to the hospital for treatment.

A third person believed to have participated in the attempted shoplifting is still on the loose, deputies said.

Witness Renee Kirmani told Channel 9 she saw the three individuals pushing carts filled with diapers and other baby items to a car in the parking lot as a Walmart employee chased after them.

“I see them surrounding the car (and) the boys throwing stuff in,” she said. “(The employee) was like, ‘Don’t get in the car.'”

Kirmani said she was too busy taking cover to see the shooting take place.

“That I didn’t see,” she said. “I heard shots and then we just ducked down, because we didn’t know where the shots were going.”

Orange County Sheriff’s Office spokesman Capt. Angelo Nieves said the suspects got into the maroon Nissan Rogue and fled the scene. The Nissan was reported stolen during a carjacking on Jan. 13, deputies said. 

Deputies said the driver hit two vehicles in the parking lot, causing one of the cars to spin.

Deputies responded to that scene, and the suspect, who was found at a nearby gas station, was taken to the hospital where he died, authorities said.

Deputies said the investigation is ongoing and the witness who opened fire is cooperating with the investigation.

Deputies have not said if the witness will face any charges.

Workers at the Citgo told Channel 9 the injured suspect walked in and fell to the floor. They said they could tell he was shot multiple times in the leg and stomach.

Deputies are interviewing witnesses and going through surveillance video to see if the suspects were armed.

Channel 9 contacted Walmart to learn about the company’s loss prevention policy, but the company declined to comment.