WAIANAE (HawaiiNewsNow) - Two-year-old Zion Sale was with an older brother and sister who were going to school around 7:30 a.m.
They were outside their Waianae home on Mohihi street when he walked around their four-door sedan to climb in through a back door.
"He was standing on the other side of the car. He was trying to get into his seat but he didn't make it," his aunt Queeny Sale said.
The toddler was hit by a passing pickup that kept on going.
Neighbors said they heard the children screaming.
"By the time I came out the car had already gone. They didn't stop or anything. They just kept going," Kanani Lovelace said.
"My nephew and my niece carried him to the porch and he was bleeding with scratches on his face," Sale said.
Witnesses followed the truck to a home a few blocks away and called Honolulu police.
"Patrol officers identified an 80-year-old male as the driver of the vehicle," said Lt. David Nilsen of HPD's traffic homicide division.
Lodrego Puerto was arrested on suspicion of negligent injury.
His family said he had driven his great granddaughter to school and was coming home.
"My daughter starts at seven o'clock so around six-thirty he gets out," his grandson Miguel Jilhaney said.
Police are investigating whether speed, drugs or alcohol were involved.
Negligent injury is punishable by up to five years in jail.
"How could you just do this to a kid. He's only two," Sale said.
Zion's family said he suffered head, back and hip injuries. He underwent emergency surgery and was listed in critical condition.