Mountain View, CA – An active duty United States Navy sailor was fatally shot on Saturday, when he stopped to help a driver he thought was a stranded motorist.

Steelworker Constructionman Curtis Adams, 21, was driving with his girlfriend on Interstate 15 just before 2:30 a.m. on Oct. 27, when he spotted what he believed was a stranded driver parked on the shoulder of the road, WSWB reported.

The good Samaritan pulled over near the intersection of Interstates 15 and 5 in the Logan Heights section of San Diego to assist the stranded motorist.

As soon as he stepped out of his vehicle, he was immediately shot, the Navy Times reported.

The gunman, later identified as 21-year-old Brandon Acuna, and a second person in the suspect vehicle fled the scene.

Adams, an active duty Navy sailor based in San Diego, was rushed to a local hospital with a gunshot wound to his upper body.

He later succumbed to his injuries.

The murdered Seabee was originally from New York and joined the Navy on March 15, 2016. He’d served in the Amphibious Construction Battalion 1 in San Diego since September of 2016, according to the Navy Times.

Investigators used freeway monitoring cameras to help locate Acuna’s vehicle, and were able to apprehend both suspects on Interstate 5, near 32nd Street.

According to police, just minutes before Acuna murdered Adams, he and his unnamed accomplice attempted to break into a man’s vehicle on Boundary Street.

When the victim interrupted them, the suspects shot at him.

The victim was not injured during the attack.

The investigations into both incidents are ongoing, KNSD reported.

Acuna was booked into the San Diego County Central Jail, where he is being held without bail on charges of first-degree murder and second-degree burglary.

He is scheduled for arraignment at 1:30 p.m. on Halloween at San Diego Superior Court, according to the Navy Times.

Acuna’s criminal history showed a pattern of misdemeanor offenses, including creating a public nuisance, possession of methamphetamine, and traffic offenses.

Just six weeks before Adams’ murder, Acuna was sentenced to three years of probation.