Police have identified the man killed in Friday night's crash along Kalanianaole Avenue as 23-year-old Joseph Nieves Junior of Hilo.
Witnesses said the car was traveling Hilo-bound when it crossed the center line and struck a mail box, sheared a utility pole, and struck a stone wall.
Nieves was pronounced dead at the scene while a 18-year-old man was medivaced to the Queen's Medical Center.
Police say speed and alcohol appear to be factors in this crash. Both men were wearing seatbelts. A negligent injury investigation is underway.