Felon from child sex assault case jailed again

Marlo Pronovost
Thursday, September 12, 2019
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Yellowstone County Detention Facility

Chester Allen Bagley

A man on probation for assaulting a developmentally disabled teen is behind bars again, this time accused of violating the terms of his probation by using methamphetamine and amphetamine, as well as being kicked out of sex offender treatment.

Chester Allen Bagley, 47, was arrested on a felony probation violation warrant and jailed in the Yellowstone County Detention Facility on Sept. 3, 2019. Bond was set at $50,000.

According to court documents, Bagley has admitted to using meth and amphetamine “four days per week since April of 2019. Bagley was also terminated from a sex offender treatment program due to alleged non-compliance.

Less than one year ago, Bagley was sentenced to five years of probation and ordered to comply with 47 court-imposed conditions when he pleaded guilty to felony criminal endangerment. Bagley’s probation was also supposed to be transferred out of state.

He spent more than year in jail before the case was resolved and was initially charged with sexual intercourse without consent.

At the sentencing hearing in 2018, then Judge Blair Jones noted that although Bagley had pleaded guilty to criminal endangerment, he was being sentenced “with considerations” as a sexual offender, with the agreement of defense attorney Greg Paskell and Stillwater County Attorney Nancy Rohde.

Bagley admitted to having sexual contact with a 16-year-old boy who was developmentally disabled. Rohde amended the charge due to what she said had been a “difficult case” due to the victim’s mental capacity.


Authorities alleged that Bagley approached the boy at his workplace and “groomed him for a sexual encounter,” according to court documents. The teenager had cognitive disabilities as well as a history of sexual and physical abuse, according to court documents.

When the teen finished his shift and was waiting for his father to pick him up, Bagley allegedly sexually assaulted him. When the teen’s father arrived, Bagley hid behind a nearby bush.

The teen told his father he wanted to ride his bicycle home and the father watched him ride toward the I-90 overpass toward home and then left in his vehicle.

When the father was out of sight, Bagley got on his own bicycle, caught up with the teenager and raped him, according to court documents.

The teen’s parents reported the assault to police.