The California Highway Patrol believes at least one of the drivers involved in a deadly head-on collision in Guerneville was traveling at an unsafe speed. One driver was killed and two other people were injured in the crash, which happened at about 10:45 Wednesday morning. Investigators say the speeding driver suddenly veered sharply to the left for an unknown reason. He crashed into another vehicle going the opposite direction, killing its driver. The speeding driver has minor injuries and his passenger has major injuries.