Woman Charged With Murder in US Sailor's Traffic Death Darla Jackson sobbed in a court appearance.

 -- A woman is behind bars in California, accused of killing a U.S. sailor in a fit of road rage.

Darla Jackson sobbed Tuesday during a court appearance, pleading not guilty to first-degree murder in the May 28 death of Zach Buob, 39. Investigators say Jackson and Buob were in rush-hour traffic when they began arguing.

Police say Jackson chased after Buob and rammed his motorcycle — pushing him 300 feet until he fell, then running over him.

“We are talking about something that went from a simple traffic violation to a murder,” San Diego CHP Public Information Officer Jake Sanchez said.

Stephen Cline, Jackson’s attorney, said video from the scene doesn’t tell the whole story.

“He kicked her car,” Cline said. “She chased after him, and they collided at the end when they ran into traffic.”

According to court records obtained by ABC affiliate KGTV, two of Jackson’s ex-boyfriends filed restraining orders against her, and one accused Jackson of stating that she would run him over with her car.

Buob’s friends, such as Britney Morrow, packed the courthouse, hoping to send a message.

“Even if you’re angry, never use your car as a weapon, ’cause it can turn deadly,” Morrow said.