Authorities say a pair of siblings from Billings teamed up last year to steal perhaps two dozen guns from an elderly Powell resident.

Sierra E. Price, 31, and her brother, 35-year-old Ryan D. Guy, are facing felony charges in connection with the September 2025 theft.

Park County prosecutors charged the duo back in May, but Price was only recently arrested, while records show Guy remains jailed in Billings on an unrelated drug case.

Charging documents say Price had been asked to clean up the alleged victim’s residence after the man was placed in a retirement home. Though she declined the cleaning job, authorities allege Price later returned to the vacant residence with Guy, who stole numerous guns from the home.

Guy has been charged with felony counts of aggravated burglary and conspiracy to commit aggravated burglary; Price, meanwhile, faces a felony count of conspiracy to commit aggravated burglary.

‘Firearms all over the house’

The theft was reported in late September 2025.

A local resident told the Park County Sheriff’s Office that roughly 25 guns had gone missing from his father’s home in the Garland area.

The adult son reported that his father, who’d recently been moved to a care facility, “had loaded firearms all over the house in case he needed one,” Sheriff’s Deputy Robert Donaldson wrote in an affidavit.

When Donaldson arrived at the trailer, he noted that the front door “appeared to be very easy to open.” There was a lot of stuff in the trailer, and as a result, “I believed the person who had taken these guns would have to have known their locations,” the deputy wrote.

The stolen items reportedly included rifles and black powder revolvers, ranging from an $80 pellet gun to a $1,000 .303 British bolt action rifle with a blued barrel and sniper wind-age adjustments. The elderly man is a gunsmith and three firearms that belonged to a neighbor were also reportedly taken. 

Tipped off by a jailhouse informant

The case initially went cold, but authorities caught a break in December. Guy had been arrested on unrelated allegations and while being held in the Yellowstone County Detention Center, he reportedly told a fellow inmate that he’d stolen “a bunch of guns” from a man in Wyoming.

Guy allegedly boasted “that it was the perfect crime because the old man was in a retirement home and the old guy did not have the serial numbers for the guns,” Donaldson wrote.

However, charging documents say the inmate decided to share Guy’s alleged confession with Billings Police Det. Steve Hallam.

Although the tipster didn’t know where the guns had been stolen from, Guy had reportedly offered several clues. For example, he reportedly said that his sister, Price, was supposed to have cleaned the man’s house.

Price had also served her own jail stint, charging documents say, and Hallam began reviewing the calls that she placed from custody. He wound up finding that Price had called the man’s son, which broke open the case.

The man’s son confirmed he knew Price and said he’d asked Price if she wanted to clean out his father’s home. Though Price declined, the son thought she probably saw the guns during her tour of the residence.

In her own December 2025 interview with Det. Hallam, Price allegedly admitted that she’d brought Guy to the older man’s Powell residence and that Guy took “a lot of guns.”

Additionally, authorities say they learned that on Sept. 7, 2025, Guy sent his significant other a picture of 10 guns; the man’s son identified about eight of them as having been stolen from the Powell home, the affidavit indicates.

Siblings both in custody

Guy was arrested in Park County, Montana, in mid-June, but before he could answer to his Wyoming charges, he was transferred to Billings to face separate charges there. Yellowstone County jail records indicate he’s being held on allegations that include criminal possession of dangerous drugs and possession with intent to distribute.

The records suggest he’ll be brought to Cody once those allegations are resolved.

Meanwhile, Price was also arrested in Montana and was transferred to Park County’s custody on Sept. 25.

At an initial Sept. 28 hearing, Deputy Park County Attorney Ericka Smith asked that Price’s bail be set at $20,000 cash.

“The high bond’s necessary to ensure her return to court,” Smith said, adding that, “The fact that she’s a convicted felon that was in possession of a firearm, based on these allegations, is obviously very concerning.”

Yellowstone County District Court records say Price was convicted of criminal possession of dangerous drugs in 2018; Smith initially charged Price with a misdemeanor count of possessing a firearm despite a prior nonviolent felony conviction, but dropped that charge on Monday.

During the Sept. 28 hearing, Price said she was progressing through an inpatient drug treatment program in Billings at the time of her arrest on the Park County charges.

“I was working to better myself and to reunite with my 1-year-old daughter,” Price said, asking Circuit Court Judge Joey Darrah to consider that, “I’m just really trying to move my life forward in the right direction here.”

Darrah said he hoped that Price could get the treatment she needed, but temporarily adopted the prosecution’s $20,000 recommendation. After Price’s public defender came on board, however, the prosecution, defense and Darrah agreed that she could be released on a signature bond to complete her treatment. Price’s next appearance will be an arraignment in district court.