The man arrested in the Sunday death of his girlfriend’s 1-year-old son beat the boy with a belt and told the boy’s mother “he thinks her child is dead,” court documents say.

Raymond Parker, 23, told police he “whipped” Demarcus Stokes with a belt, causing the boy to hit his head in the bathroom at 2627 Erie St., an affidavit of probable cause says.

Parker then brought the child to his girlfriend, Kimyia Stokes, 22, and told her he thought her child was dead, the affidavit says.

Stokes, who also was arrested in her son’s death, told police she heard her son yelling in the bathroom and she watched Parker beat the child three times between Saturday and Sunday, the affidavit says.

Stokes said Demarcus was breathing irregularly around 1 a.m. Sunday when Parker brought the child to her after the beating in the bathroom, the affidavit says. She said her son stopped breathing around 3 a.m.

Stokes and Parker dressed the child and “waited around trying to figure out what to do and say” before calling 911 at 6 a.m., the affidavit says.

Paramedics with East Baton Rogue Parish Emergency Medial Services arrived at the couple’s home shortly after 6 a.m. but could not revive the child, Baton Rouge police have said. Police were on scene moments later.

Cpl. L’Jean McKneely, a spokesman with the Police Department, said Parker hit Demarcus because he wouldn’t sit still for a haircut and because the child urinated on himself during the night.

The results of an autopsy done on the boy showed he died of blunt force trauma to the head, throat, legs and arms, McKneely said.

Police arrested Parker on Sunday and booked him into East Baton Rouge Parish Prison on a count of illegal possession of stolen things after finding several stolen televisions inside his home.

Parker was booked Monday on a count of first-degree murder in Demarcus’ death.

Kimyia Stokes was arrested Tuesday and booked into Parish Prison on one count each of second-degree cruelty to a juvenile and accessory after the fact to first-degree murder.

Stokes, who is pregnant with Parker’s child, is accused of knowing about the beating of her son and doing nothing to stop it, McKneely said. She also is accused of waiting three hours after her child had stopped breathing before calling 911.

Two other adults living at the Erie Street residence were arrested Sunday and booked into Parish Prison on one count each of illegal possession of stolen things.

Brandon Tate, 30, and Kierra Golman, 21, were arrested after police found several stolen televisions and more than $16,000 in cash stashed throughout the house, McKneely said.

Three children at the Erie Street home were put under the care of Child Protective Services, McKneely said.

Two of those children, 1-year-old twin girls, were found with diaper rash so bad they were bleeding, he said. A 2-year-old boy seemed to be in good condition.

The children’s relationship to Demarcus has not been determined.