A Mexican man confessed to fatally shooting his lifelong friend before cutting off his penis and feeding it to his dog, Central European News reported.

In a televised confession, 25-year-old Mario Alberto Lizalde Reyes admitted to killing his friend Mario Hernandez Banda following an argument as the two walked his dog in Ciudad Juarez, Chihuahua state.

"We were both drunk and he tried touching me in a sexual way," Reyes said according to CEN. After pushing Banda away, his friend went to an alley to urinate. That's when Reyes pulled out his gun and shot his 24-year-old friend in the head, Reyes said.

"I then took his knife off him and chopped off his penis as punishment and put it in a bag," the alleged murderer continued. "But my dog was next to me and was sniffing at it so I decided to give it to him and he ate it."

Reyes left Banda's body in the alley and went home with his dog. When he woke up sober the next morning, he realized what he had done and immediately turned himself in. Reyes now faces life in prison.

At first Reyes told police he got into a fight with his stepfather during the altercation in the city's Parajes de San Isidro neighborhood.

But "he then admitted killing his best friend and said that although his friend had tried sexually assaulting him, he was still a human being and didn't deserve to die," a police spokesman told CEN.