Big Island police have opened a negligent homicide case and two counts of negligent injury, after a head-on crash on Hawaii Belt Road in Mountain View. The crash happened just before 1:45 p.m. Wednesday. A 69-year-old man was driving north in a Ford sedan when a Ford pickup driven by a 23-year-old man crossed the center line and crashed head-on into the sedan. The driver of the sedan was pronounced dead at Hilo Medical Center at 3 p.m. His 64-year-old female passenger was in stable condition. The driver of the pickup truck was also in stable condition and his four male passengers - ages 19, 20, 21 and 22, were treated for minor injuries and discharged.