A couple from Texas has been taken into custody after authorities discovered the remains of their adult son with special needs buried in their backyard, investigators reported.

The body of 26-year-old Jonathan Kinman was uncovered during a police welfare check at the residence located at 433 White Oak Lane in Burleson, according to a statement shared by the Burleson Police on social media.

Jonathan’s mother, December Mitchell, along with his stepfather, Jonathan Mitchell, are facing charges of tampering with and fabricating physical evidence to conceal a human corpse. This charge is a second-degree felony, and the pair might confront further charges following the results of an autopsy and the ongoing investigation. Both are currently held on a bond set at $250,000 each.

December and Jonathan Mitchell are being accused of manipulating physical evidence in relation to the human corpse. (Johnson County Jail)

The police were called to the Mitchells’ home for a welfare check on October 14, as Jonathan Kinman resided there with his mother and stepfather.

Deputy Police Chief Doug Sandifer said an investigation was launched after a friend of the family reported seeing a confusing Facebook post from the couple mourning the death of Kinman, according to Fox 4.

Investigators became suspicious after the couple acknowledged Kinman’s death but would only give vague information about how he passed, Sandifer said, the outlet noted.

Investigators became suspicious after the couple acknowledged Jonathan Kinman’s death but would only give vague information about how he passed. (Burleson Police)

“The first information was she said he was taken to Hugeley Hospital and pronounced there. We followed up with that and that was not correct,” Sandifer said. “The conflicting information definitely led us to believe that something was not as it should be.”

On Oct. 15, police officers returned along with the Texas Rangers and discovered a shallow grave in the backyard.

Kinman’s body was exhumed and transported to the Tarrant County Medical Examiner’s Office, where an autopsy was performed. The autopsy results are still pending, and a cause of death has not yet been determined.

The autopsy results are still pending, and a cause of death has not yet been determined. (Burleson Police)

It also remains unclear when Kinman died.

Police said at no point during the investigation did they believe there was any threat to the community.