Follow CBSPHILLY Facebook  | Twitter

LOWER MERION TOWNSHIP, Pa. (CBS) – Authorities say a man has confessed to killing his father and then dumping his body on the side of the road in Gladwyne.

Authorities arrested Robert Coult III. They say he murdered his father, 59-year-old Robert Coult Jr. of Yeadon, Delaware County, over a small amount of money.

“Our investigation shows that they were literally having an argument over a small amount of money,” said Delaware County District Attorney Katayoun Copeland.

Detectives say Robert Coult III bludgeoned his father with a hammer and then fatally stabbed him with a butcher knife during an argument on Friday. They also say he attempted to dismember his father, but failed.

“He put a fresh t-shirt on him, literally seat-belted him in and drove him to the location where he ultimately discarded him,” explained Copeland.

Robert Coult’s girlfriend had reported him missing. Investigators say they became suspicious of his son’s behavior as he was seemingly unconcerned about his father.

Police say they asked Coult III where would his father go if he had a lot on his mind, and he said Lower Merion.

“He apparently liked to kayak and boat off of the dock in Lower Merion,” said Yeadon Police Chief Anthony Paparo.

Robert Coult’s body was found along Spring Mill Road in Gladwyne around 7:30 a.m. on Saturday. Police were eventually able to positively identify the remains and investigators say the body had been placed there with a degree of dignity.

At the home on West Providence Road in Yeadon, investigators were able to uncover small amounts of blood splatter. Police say Coult III did a thorough job of cleaning up the home.

Police say Coult III appeared to have little regret for the outcome of his actions in his statement confessing to the crime.

“I did not see any remorse whatsoever yesterday when I was dealing with him – none,” said Paparo.

Coult III was arraigned and is being held in Delaware County prison without bail.