The Parker man accused of fracturing the skull of his former mental health worker with a hammer because he allegedly said she took his energy pleaded not guilty by reason of insanity.

Arapahoe County Sheriff's Office
Filipp Kazakov

Filipp Kazakov made his not-guilty plea on Friday in Arapahoe District Court, said court executive Shaun Clark. Kazakov is next scheduled to appear in court on July 19, according to court records.

Kazakov, 45, was arrested Nov. 18 in the 4100 block of South Dunkirk Way in Aurora, arrest documents show.

Police responded to the victim’s home and found her face and clothes covered in blood. She was transported to Aurora South and doctors determined she had multiple penetrating skill fractures, a broken humorous and other injuries.

A friend of the victim’s told police that he saw Filipp at the victim’s house once a week for about three months. Parker police contacted Aurora police to inform them they were in contact with Kazakov, according to the documents.

After arriving at Kazakov’s location, police said the man “made a spontaneous utterance and asked ‘if she was dead,’ ” the documents stated.

In an interview with police, Kazakov told police that he was seeing the victim for mental health issues for a year and a half before the incident, and he claimed that the victim was a KGB Russian agent who “specialized in spiritual exorcism,” the documents stated.

Kazakov allegedly told police that the victim implanted a part of herself in him and took his energy, so he went to her home, pushed her down the stairs into her basement and hit her with a hammer several times.

He allegedly told police he did this so he could get his energy back.

Kazakov is facing charges of attempted first-degree murder, first-degree assault and second-degree burglary, according to court records. He’s being held in the Arapahoe County jail on a $300,000 cash or surety bond, jail records show.