Mark and Jennifer Cannon admitted to police they had been drinking all night before getting into an argument.

Mark Cannon told cops he left the home with Kadence and her one-year-old brother. Cannon said he came home around sunrise and put the little girl to bed.

Over six hours later, Connon says he found her unresponsive.

“I need an ambulance. My little niece is not breathing,” an aunt said after calling 911.

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Cops said both parents still appeared to be intoxicated when they arrived at the home. They were arrested and taken to the Garfield County Detention Center, accused of child neglect.

"There was evidence that the neglect had taken course over a period of time," Lt. Eric Holtzclaw told KOCO in Oklahoma City.

The girl's aunt defended Jennifer Cannon,  saying “she did nothing wrong.”

An autopsy will be performed to determine the cause of death. Meanwhile, the one-year-old boy was taken into protective custody.

More here.