An Oahu woman is dead and a man is behind bars suspected of driving under the influence during a deadly crash in Kaaawa early Saturday morning.

The two-car crash happened around 4:30 a.m. along Kamehameha Highway just south of Kaaawa Place.

The impact of the head-on crash killed 49-year-old Rene Nihipali.

The sound of the two vehicles colliding jolted Keano Hawkins awake.  He jumped out of bed to help the victim.

"I walked over to the truck and she wasn't moving and I checked her pulse and there wasn't nothing," said Hawkins.  "I was asking her to wake up, but she didn't respond."

Honolulu police said the driver of the black Jeep Compass was headed north when his vehicle crossed the center line crashing into Nihipali's white pickup truck.

Investigators said at least one witness reported the Jeep swerving along Kamehameha Highway.

Police arrested a 25-year-old man for negligent homicide and suspicion of driving under the influence.

Court records show the Kaneohe man has five misdemeanor convictions including two for drinking alcohol in public.

"The guy was drunk," said Hawkins.  "He came up and he said that he fell asleep, but you could smell the alcohol on him."