The Deschutes County Sheriff’s Office says drunk driving was the cause of a car accident Monday afternoon at Wickiup Reservoir that resulted in the death of a16 year old boy from Bend who was a passenger in the vehicle.  Investigators say an intoxicated 17 year old boy was behind the wheel of a Ford F150 carrying four teenage passengers when the truck drove into the reservoir.  Investigators say the vehicle was completely submerged when they got to the scene and say one of the teens wasn’t able to make it out.  Two were transported to St. Charles Bend with serious injuries.  The driver’s been charged with reckless driving, DUI, and criminally negligent homicide.