Brea was arrested on Tuesday (23Nov10) and charged with murder after his mum Yannick was found stabbed to death at her New York City apartment.
In an interview from the prison ward at the Bellevue Hospital Center in Manhattan, Brea claims voices in his head ordered him to attack his mum with a sword after a "demon" took over her soul.
Recounting the gruesome scene, he tells the New York Daily News, "I didn't kill her. I killed the demon inside her. So be it. It was the work of God."
The 31 year old claims he heard his mum speaking with a different voice when she summoned him to the kitchen to help her cook chicken.
He recalls, "I looked at these chickens lying dead in the pot and a voice told me it was a sacrifice. It was black magic... She had the voice of a demon. I opened the door with the dagger at my side and the sword.
"I asked, 'Do you believe in God?' She said, 'No, Michael, no' and began screaming. I began slashing her. I didn't want to kill her right away. I wanted to give her time to get right with God."
Brea, who has had small roles in Ugly Betty and Step Up 3D, adds: "I was slashing my mom and I heard the police knocking on the door... but I knew they wouldn't open the door and stop me because the spirits were protecting me. I just kept cutting her. No one could stop me. I was doing the work of God."