Mel Melcon, Associated Press
On Friday, California Highway Patrol officers salute during a highway dedication ceremony in memory of four CHP officers shot to death in the line of duty on April 6, 1970. The four young officers were slain as they tried to apprehend two people.

On Friday, California Highway Patrol officers salute during a highway dedication ceremony in memory of four CHP officers shot to death in the line of duty on April 6, 1970. The four young officers were slain as they tried to apprehend two people.