Security guard Dean Sena was killed in a shooting at a Rancho Cucamonga mini-mart on Saturday, Feb. 22, 2014.
Police on Sunday arrested a man in connection with the slaying of a security guard who was shot and killed at a mini-mart in Rancho Cucamonga one night earlier.
Diego Dominguez was arrested Sunday about 8:30 a.m. at his Rancho Cucamonga home in connection with robbery and murder, according to the San Bernardino Sheriff's Department.
Dominguez is accused of entering the store in the 1000 block of Arrow Route just before midnight Saturday and demanding money from store workers, officials said. One worker gave an undisclosed amount of money and another clerk was able to escape the store.
West Coast Metro Patrol security guard Dean Sena, 45, drove up to the scene and tried to stop the alleged robbery but was shot several times.
Sena, who was armed with a gun, was never able to pull out the weapon, authorities said. Dominguez allegedly fled on foot after the shooting.
Sena died of gunshot wounds at San Antonio Community Hospital. He was preparing for retirement, his family members said.
A witness who lives near the scene said he heard the incident as it happened.
"I was in my apartment when I heard all these gunshots, I didn't know what was going on," he said.