The pedestrian, identified as a man in his 20s or 30s, suffered fatal injuries when struck as he stood outside a van peddling snacks.

Honolulu Police Lt. Bennett Martin said investigators have not been able to question the woman, who is in critical condition at The Queen’s Medical Center but hope to talk with her physician to determine if a "medical condition" contributed to her erratic driving.

The woman was driving a 2002 Toyota Camry that hit the wall of a store and another vehicle on Waipahu and Paiwa streets, near Hans L'Orange Park, before triggering a chain-reaction crash involving five other vehicles minutes later.

The Camry sped off from the scene of the first accident, in which there were no reported injuries. The car was headed east on Paiwa Street when it drifted to its right near Waipahu Recreation Center and rear-ended a parked 1993 Nissan sedan at 2:25 p.m.

After hitting the parked car, the Camry veered to its left and sideswiped a moving 1998 Kia. The Kia then hit a man standing next to a 1984 Chevy van, which was peddling snacks. The Kia also struck the van and forced it into a parked 1991 Mazda pickup.

The woman vendor, 52, tried to drive off in her van and hit the pickup a second time. An 11-year-old boy, who was a passenger in the Camry, was treated for injuries at the scene and released, police said.