Honolulu police said a man was charged Thursday in a deadly hit-and-run case that happened last Saturday.
Police arrested 31-year-old Mark Salangdron from Ewa Beach at Wet'n'Wild Hawaii in Kapolei Tuesday morning.
Bail has been set at $250,000.
Salangdron was charged with failure to render aid and extortion.
A passenger in the car, Elijah Kawai-Aweau, was charged with hindering prosecution. His bail was set at $150,000.
Investigators said 30-year-old Matthew Fragas was crossing Kahekili Highway at 2:15 a.m. Saturday when he was hit 25 feet south of Ahuimanu Place.
Police believe the vehicle that struck the man was traveling southbound on Kahekili Highway, which has a speed limit of 35 mph.
"The victim was pronounced dead at the scene," said Lt. Bobby Towne of the HPD's Traffic Division. "At this point, we are looking for any witnesses who may have seen the collision to give us a call."
Relatives said two women who live in the area spotted Fragas' body on the roadway and pulled over to help. They used their car to shield him from oncoming traffic as one of them performed CPR.
Fragas, a 2000 Castle Highway Graduate, joined the Air Force Reserves in 2002. He was assigned to the 624th Civil Engineer Squadron at Hickam Air Force Base, where he worked as a firefighter within one of the unit's fire protection groups.
Fragas had been deployed to Iraq and Afghanistan during his time in the military.
The victim's father said Fragas had argued with his wife, and walked away from the couple's home to "blow off some steam." A few minutes later, he was dead on the roadway, about one-tenth of a mile from his home.