A 29-year-old woman has been arrested after authorities say she intentionally ran over her 6-year-old son and then dumped his body into a river.

The incident occurred over the weekend in Cincinnati, Ohio.

Officials say Brittany Gosney contacted them on Sunday to report her 6-year-old son missing. After a search and further questioning of Gosney, the mother eventually confessed that she attempted to abandon the child at a park a few days prior but the child was able to get back to the car before she could drive off. Gosney says that’s when she ran him over and took the boy’s body with her.

“Sadly, upon further questioning of Brittany Gosney and her boyfriend, James Hamilton, they now say that James was killed in Preble county a few days ago,” authorities said in a statement. “The child’s body was brought back to Middletown, where they live, and later put into the Ohio River.”

Police in Middletown say they are working on recovering the body from the river, however, “the river is very high and treacherous, so we will not be disclosing the exact location in hopes of avoiding another tragic, incident,” police said.

Gosney has been charged with murder, abuse of a corpse and tampering with evidence. Hamilton is facing a charge of abuse of a corpse and tampering with evidence.

Authorities also reported that two other children lived with the couple but have been removed from the home.