SANTA ANA ( — A $100,000 reward is being offered for information leading to the arrest of a man who tried to kill a co-owner of a Santa Ana marijuana dispensary .

The gunman shot Derek Worden, 48, at about 3 p.m. on Nov. 2, 2015 as he walked to his car, police said.

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Worden, who co-owns South Coast Safe Access at 1900 E. Warner Avenue, suffered several gunshot wounds in the abdomen and shoulder and has recovered.

Andrew Clayton, a security guard, quickly came to the aid of the victim. “I put pressure on his wound with one of my work shirts. After that, I made sure he was all good,” Clayton said. “And then he told me to go after the guy. So I jumped in my patrol car, and I drove after the guy, but I could not catch him.”

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However, security cameras were able to capture the suspect on video as he cased the shop before the shooting, which was also caught on camera.

Worden said the shooter is apparently angry with him.

The suspect was described as 20 to 30 years old, 5 feet 4 to 5 feet 6, with a thin build, said Cpl. Anthony Bertagna. He was wearing a hoodie.

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If you recognize the suspect, call the Santa Ana Police Department at (714) 245-8390.