A woman suspected of driving under the influence and two passengers are dead following a crash on Highway 12 in San Joaquin County Sunday afternoon, the California Highway Patrol said.

A man was killed while he was trying to help a stranger in need near Atwater over the weekend. 28-year-old Abraham Bustos Guzman was hit by a car after he stopped to help a different driver who had crashed into a guardrail.

The good Samaritan was standing near the right side of the GMC while attempting to assist the right front passenger and was struck by the Honda. The good Samaritan sustained fatal injuries and was pronounced dead, CHP said. The GMC and Honda became disabled, blocking the southbound lanes of Highway 99, north of Westside Boulevard.