A man from Weymouth, Massachusetts, suffocated his father to death by knotting a plastic bag over his head and tried to bury the body in the backyard of their home.

According to Norfolk County Assistant District Attorney Lynn Beland, when family members went to check on the duo in their home in 36 Lochmere Avenue, Saturday (May 16) they found the doors locked. They managed to get inside through the garage and found, 61-year-old William D. Walling Sr., dead with a plastic bag over his head. At that time, 37-year-old William Walling Jr. was found watching TV in the adjacent room.

According to the prosecutors, the bag had blood on it and Walling Sr. suffered cuts to his face.

When the police arrived, they found Walling Jr. in front of the house. Paramedics from South Shore Hospital pronounced Walling Sr. dead at the scene.

According to the prosecutor, the police during a search in the house found a wheelbarrow and a hole in the backyard. The officers found a receipt from a home improvement store for saws, and a 40-pound bag of lye, a corrosive chemical in his pocket.

“He was attempting to conceal his father’s body in a grave in the backyard,” Beland said during the arraignment Monday.

An autopsy was conducted and the medical examiners confirmed that the Walling Sr. died due to “manual asphyxiation.”

His arraignment was conducted via teleconference through Quincy District Court. A not guilty plea was entered on Walling Jr.’s behalf.

Walling Jr.’s lawyer Earl Howard entered a “not guilty” plea on his behalf saying that none of the evidence presented indicates he killed his father.

In a case that is still pending in Quincy District Court Walling Jr. was previously accused of punching his father in the face several times last year. He was charged with assault and battery on a person older than 60.

Walling Jr. is held without bail and will be back in court on July 8 for a probable cause hearing.

handcuff Representational image of a man in handcuffs. Photo: Kevork Djansezian/Getty Images

In a similar incident, a Minnesota man was charged with second-degree murder after he strangled his wife until she was “death breathing” then taped her head inside a plastic bag before digging a hole in the crawl space of their home and burying her.