A suburban Boca Raton man is facing vehicular homicide and DUI manslaughter charges after an August crash that killed a passenger in his car. The Palm Beach County Sheriff’s Office said Christopher Gallon’s blood-alcohol level was above the threshold for intoxication hours after the wreck that killed 21-year-old David Hernandez on Aug. 3. Investigators estimate Gallon was driving at 75 mph when he struck another car on Camino Del Mar west of Boca Raton. Gallon remained in custody Wednesday with his bail set at 55 thousand dollars.