Utica, NY -- The Belius family’s golden retriever, Scooby, usually slept in the upstairs hallway of their home on Primo Avenue in the city of Sherrill, in between the bedrooms of twins Lauren and Erica Belius and their older brother Nolan.

On July 19, police investigators found the family dog had been shut in the garage while David Trebilcock fatally stabbed 6-year-old Lauren Belius with a 5-inch kitchen knife.

Trebilcock, who faces faces felony charges of second-degree murder and second-degree assault, had also used a heavy dresser to barricade the door to the girls’ bedroom.

In the final day of testimony in Trebilcock’s murder trial, forensic psychiatrist Lawrence Farago said the measures were a sign of the depth of Trebilcock’s delusions.

“Because she was the anti-Christ, he needed time to say a prayer,” Farago testified this morning. “He need to make sure he killed her in the proper way, to make sure that God’s will was done.”

Farago was hired by prosecutors last year to evaluate Trebilcock’s mental status, but Assistant District Attorney Dawn Catera Lupi did not call Farago to the stand after his report concluded that Trebilcock “lacked the capacity to know or appreciate that (his crime) was wrong.”

Instead, Farago was the final witness called by public defender Patrick Marthage Friday morning to discuss his diagnosis of paranoid schizophrenia.

Farago said Trebilcock displayed “very typical, credible, psychotic symptoms,” which were unable to be faked. Farago’s testimony also included descriptions of some of Trebilcock’s delusions, including concern about the “Battle of Brooklyn” which will include the “sky turning black.”

During cross-examination, Lupi asked why Trebilcock seemed “able to suspend his delusions when asked about his legal predicament.” “All symptoms fluctuate over time,” Farago answered. “People have better days and worse days.”

Lupi also asked Farago about about statements Trebilcock made to police that indicated he knew what he did was wrong and deserved to be punished. “It might as well be life (in prison),” Trebilcock told New York State Police Investigator Chad Tangorra when asked about possible punishment. “I mean, it’s a kid.”

Farago said the comments needed to be considered in the context of Trebilcock’s psychotic ramblings. “That was the compass he was using,” he said. “He believed he was a special messenger from God and that he was doing God’s work.”

He also pointed to Trebilcock’s admission to emergency responders that he regretted that the attack had taken place in front of Lauren’s twin sister. “Mental illness is not a complete bending of the mind,” Farago said. “There is some ability to preserve judgment.”

Closing arguments will begin at 10:30 a.m. Tuesday, followed by deliberations by Oneida County Judge Michael Dwyer.