A Good Samaritan was shot and killed while trying to protect a woman in a domestic dispute with her husband outside an Arlington, Texas Walgreens pharmacy on Monday morning.

The incident started as an argument between Quinisha Johnson and her husband of less than two months, Ricci Bradden. He was angry over a revealing photo his wife posted to her Facebook page and the attention it was receiving, Johnson told WFAA-TV News.

Their argument turned violent on Monday morning when Bradden showed up at the Walgreens on New York Avenue in Arlington where Johnson works.

"He was just saying I was tripping, and I wanted attention from other people and attention from my husband just wasn't enough," Johnson told the news station. "And I was trying to explain it to him, that I married you. You're all the attention that I needed. And I could feel that he was getting mad, so I tried to walk off, and that's when I heard him pull the gun out."

Ricci Bradden

Johnson tried to run away, but she was shot once in the leg, according to the report.

That's when Anthony "T.J." Antell - a Marine, a gym owner and a father of three - heard the gunshots and tried to help.

NBC 5 reported Antell went to his vehicle to retrieve his firearm and tried to keep Bradden from leaving the scene.

"At that point, the suspect exits the vehicle, shoots the good Samaritan. The good Samaritan is pronounced deceased at the scene," Arlington police Lt. Christopher Cook, told the TV station.

Antell's wife, Crystal, witnessed her husband's death.

"He went into a protective mode," said Pastor Marc Lowrance, an Antell family spokesperson, told WFAA. "He's a father, protective by nature, and he thought he could help."

Bradden, who is in the Army and stationed at Fort Hood, turned himself in to police and reported confessed to the shooting. He is charged with murder and aggravated assault.