BILLINGS – A Billings man is accused of sexually abusing a young boy and threatening to kill the child’s mom.

Buck James Feist, 50, was set to make his initial appearance Friday in Yellowstone County Justice Court on two felony sex crimes and one count of tampering with witnesses.

The boy’s school counselor alerted the Department of Public Health & Human Services in September of 2017 about a report of sexual and physical violence.

Another student’s parent had expressed concerns to the counselor that the boy was being molested.

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The boy had told his classmates that Feist threatened to “blow” the face off his mother, according to court documents.

The alleged abuse began in 2014, when the boy was 6 years old.

On one occasion, the boy’s mother walked in on Feist and her son in a precarious position.

Feist, who reportedly takes medications for pain and insomnia, appeared to be in a “zombie state,” according to the woman.

When the woman asked what was going on, her son said he and Feist were “having sex.”

Once the woman separated Feist and her son, she questioned the boy further.

The child described performing oral sex and experiencing oral sex, according to court documents.

The woman confronted Feist, who she said appeared to be highly under the influence of the medications.

She recorded Feist in a cell phone video as she asked him about what her son had recounted and Feist allegedly admitted “having sex with him” because “he likes it.”

The child underwent a forensic interview in 2017, where he did not disclose information about the sexual abuse but did say Feist threatened to “shoot the dog’s face and his mother’s face.”

The boy’s mother was ultimately granted a restraining order against Feist, which he allegedly ignored.

Feist was booked at the Yellowstone County jail on Thursday and is being held on a $200,000 bond.