(CNN) -- The father of a 15-month-old boy who died after being left in a car in July has been charged with criminally negligent homicide, according to police in Connecticut.

Kyle Seitz, 36, turned himself in at Ridgefield police headquarters on Tuesday afternoon, according to a statement from Capt. Jeff Kreitz.

After being processed, Seitz was released on a written promise to appear in Danbury Superior Court on Wednesday morning, Kreitz said.

The death of Benjamin Seitz was ruled a homicide in August.

On July 7, Seitz was supposed to drop his son off at day care, but the dropoff never occurred, his wife, Lindsey Rogers-Seitz told CNN in July.

Seitz drove to work and at the end of the day he went to pick Benjamin up at day care, only to realize he was not there, authorities said.

When Seitz realized his son was in the car, he rushed the child to the hospital, but Benjamin had died.

The cause of the boy's death was hyperthermia due to environmental exposure, according to the state medical examiner.

Neither Seitz nor his attorney immediately responded immediately to CNN's requests for comment Tuesday.

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