His victims were identified as Mrs. Alice Omorogbe 52, Mrs. Blessing Efe 25 and her baby.
Edoghogho was said to have killed them on September 10, 2019 at their residence at Iguadolor Community in Ovia North East local government area of Edo State.
A two-year-old girl inside the room at the time of the attack was spared.
The mutilated bodies of victims were discovered the following morning.
Edoghogho said he killed his in-laws because of the way they were hiring boys to beat him anytime he had issues with his wife.
On his confessional statement, he said “I am a tipper driver but since the rains started I was doing menial jobs.
“I killed them out of annoyance because my mother -in- law used boys to beat me up. She would say I am talking to my wife. If I quarrel with my wife, she will send boys to beat me up.
“I didn’t know the cutlass will meet the baby. After I killed them, I ran away. Later I came out and went to tell my father what I did. I have not seen my wife since I killed her mother and sister.”