KIEV, Ukraine (CNN) -- A man accused of murdering 52 people said at his trial Friday he was no longer a human being, but a "beast of Satan."

"I would kill today in spite of anything," Anatoly Onoprienko, 39, told the court. "Today I am a beast of Satan."

Onoprienko has confessed that he killed couples, elderly men and women and at least 10 children between 1989 and 1996. Many were shot with a sawed-off shotgun and their homes set ablaze. Onoprienko has expressed no remorse.

On Thursday and Friday, the regional court in the central Ukrainian town of Zhytomir listened to Onoprienko's evidence on the third group murder he committed in 1989.

Police video of a crime scene

Onoprienko said he shot and killed five people, including an 11-year-old boy, who were sleeping in a car. He then burned their bodies. But he said at his trial he hadn't planned on killing anyone.

"I was approaching the car only to rob it," he said. "I was a completely different person then. Had I known there had been five people, I would have left."

Onoprienko, dressed in the duffel coat he has worn since the start of the trial last week, criticized the judges and spectators for not understanding his nature.

"You are not able to take me as I am," he shouted at Judge Dmytro Lypsky. "You do not see all the good I am going to do, and you will never understand me."

Psychiatrists have declared Onoprienko mentally fit to stand trial, even though he has said he was driven by voices telling him to kill. He said Friday he was ruled by a supernatural force.

"Yes, I have such a protector, but I will not speak of him," he said. "This is a great force that controls this hall as well. You will never understand this. Maybe only your grandchildren will understand."

Public pressure is high for Onoprienko to be sentenced to death if convicted. Ukraine imposed a moratorium on capital punishment last year, a requirement for it to join the Council of Europe, a leading human rights organization.

But President Leonid Kuchma said last week he was willing to appeal to the council to grant Ukraine an exception and allow Onoprienko's execution.

Reuters contributed to this report.