The coroner has ruled his death was an accident after his father forgot to drop his baby off at day care in Louisville, Kentucky.
Jefferson County Chief Deputy Coroner Jo-Ann Farmer said that Lincoln Lindsay was pronounced dead at 6:17 p.m. on Monday and the cause of death was complications of environmental exposure to ambient heat inside a closed car.
The names of the parents have not been released because they haven't been charged.
The boy was found by one of his parents, still strapped to his car seat. The car was parked outside their home in their Louisville, Kentucky. Temperatures during the day had hit the 90s.
He was pronounced dead at the scene.
More on Parentdish: Toddler forgotten by dad dies in hot car
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