NEW: Knifeman Who Slit Ukrainian Refugee’s Throat Speaks From Jail

The alleged murderer of a Ukrainian refugee has spoken out for the first time about what may have made him suddenly become homicidal on a late-night train last month.

Decarlos Brown, Jr., who fatally stabbed Iryna Zarutska in the neck on a North Carolina railcar, sits in a jail cell charged with one count of committing an act causing death on a mass transportation system. Speaking with his sister, the 34-year-old spoke about his schizophrenia and failure to understand what set him off in that fateful moment.

“I hurt my hand, stabbing her. I don’t even know the lady,” Brown can be heard saying in a jail call recorded on Aug. 28.

“I never said not one word to the lady at all. That’s scary, ain’t it. Why would somebody stab somebody for no reason?”

Brown added that he hopes police officers will “investigate” the “materials” that were “controlling” his mind. Brown has previously called the police to his home to complain about “man-made” devices feeding instructions into his brain.

Tracey Brown, the alleged killer’s 33-year-old sister, shared the conversation with the Daily Mail in hopes of illuminating the illness her brother struggled with for the past decade that led him to kill Zarutska.

“Out of all people, why her?” Tracey asked her brother. “She’s from the Ukraine, she’s from Russia, and they had a war going on against the United States, so I’m just trying to understand, of all people, why her?”

WATCH:

“They just lashed out on her, that’s what happened,” Decarlos replied. “Whoever was working the materials they lashed out on her. That’s all there is to it.”

“Now they really gotta investigate what my body was exposed to… Now they gotta do an investigation as to who was the motive behind what happened.”

Travey, who also lives in North Carolina, asked her brother where he was traveling on the train that night.

“I was going downtown to the hospital to tell them… that I’m trying to get rid of the material… to stop going crazy,” he responded.

Speaking with the Daily Mail, Tracey said she was shocked to find herself speaking with her brother through bulletproof glass at the Mecklenburg County Jail, where he told her he believed she was “reading his mind.”

Brown explained how, over the past decade, the “protective” brother she knew from childhood slowly warped into a mentally ill adult man who believed the government was controlling his mind with synthetic devices.

“I strongly feel like he should not have been on the streets at all,” she said, pointing to multiple 24-hour discharges by medical professionals after triaging her brother.

President Donald Trump called for the death penalty for Brown on Wednesday, singling out the case as an example of urban crime run amok in Democratic-run states like North Carolina.