Town note
Settlers began coming here in the 1870s.
about 0:05:46Spoilers are covered until your reading preferences load.
FILE 694 / 24 April 2026 / 73 MIN / express
This is Sydney, Montana, SID NEY, in northeastern Montana by the North Dakota border, in Richland County. about 0:03:34
Settlers began coming here in the 1870s.
about 0:05:46A post office was established in 1888.
about 0:05:46The town was named after six-year-old Sidney Walters, whose parents were staying with Hiram Otis, the local Justice of the Peace, who chose the name.
about 0:05:46The following year Montana became a state and Sidney was incorporated.
about 0:06:19Settlers began coming here in the 1870s.
about 0:05:46A post office was established in 1888.
about 0:05:46The town was named after six-year-old Sidney Walters, whose parents were staying with Hiram Otis, the local Justice of the Peace, who chose the name.
about 0:05:46The following year Montana became a state and Sidney was incorporated.
about 0:06:19For a long time sugar beets were the main source of everything here.
about 0:06:23Then the oil boom came, tapping the shale, and everything changed.
about 0:06:39Drug crimes in eastern Montana
▲ more than doubled
Assaults in Dickinson, North Dakota
increased fivefold
Registered sex offenders within approximately one mile of the jogging route
41
Registered sex offenders per capita
▲ four times the national average
Registered sex offenders non-compliant with registry requirements
10
Registered sex offenders rated level three, the highest risk
1 of 41
"6,420"
No direction stated.
As told in 2026 about 0:04:47
"$55,611"
Comparison: "national average around $70,000". No direction stated.
As told in 2026 about 0:04:59
"$397,100"
No direction stated.
As told in 2026 about 0:05:09
"more than doubled"
Comparison: "in only a couple of years". Direction: above.
As told in 2026 about 0:13:18
"increased fivefold"
Comparison: "in two years". No direction stated.
As told in 2026 about 0:13:29
"41"
No direction stated.
As told in 2026 about 0:31:23
"four times the national average"
Comparison: "national average". Direction: above.
As told in 2026 about 0:32:28
"10"
No direction stated.
As told in 2026 about 0:32:53
"1 of 41"
No direction stated.
As told in 2026 about 0:33:01
3.8 / 5 · average of 4
“A very small, tight-knit town where everybody might know your name but you are very well cared for.”about 0:06:49
“A town 45 minutes from colleges in Williston and Glendive; people leave for college but always find their way back home to raise families.”about 0:07:14
“Loved living in Sidney and raising a family there; there may not be many conveniences, but the friendliness and community make up for it.”about 0:07:42
“The cost of living is high because of demand for people here, and not everyone makes the oil-field money, so for some it is difficult.”about 0:08:07
“The town is small and there is not much to do unless you go to the bar, and there are about eight to choose from.”about 0:09:00
“There is nothing to do here and there is no reason to stay.”about 0:09:28
Sidney, Montana, lies in Richland County in the north-east of the state, close to the North Dakota border. In January 2012 it was still a quiet rural town of about 6,420 people, a place where, as one writer put it, respectable folk went to the bar on Saturday nights and nobody locked their doors. Sherry Lee Arnold, forty-three, was a maths teacher at Sidney High School. She was born on 13 February 1968 and grew up on her family's ranch about twenty-five miles outside town, the daughter of Ron and Sharon Whited, with a sister, Rhonda. She was valedictorian of Sidney High School's class of 1986, played volleyball at the University of North Dakota in Williston, earned a teaching degree from Dickinson State University in 1990, and taught in Tioga and Minot, North Dakota, before returning home. She had taught maths in Sidney for eighteen years. She married Jerome Papineau in 1994 and had two children, Jason and Holly; the marriage ended around 1997. On 12 September 1998 she married Gary Arnold, also a teacher at Sidney High School, and between them they had five children. She had beaten a rare cancer after six years of treatment, ran half marathons, coached softball and had been named KTVQ's teacher of the month in the autumn of 2011.
Before dawn on 7 January 2012 Sherry Arnold put on her New Balance shoes and went for a run along Holly Street, the truck route past the Sidney Sugars refinery. At about 6.30 a.m. the Explorer pulled up behind her. They dragged her into the back seat, where she was strangled, and covered the body with a blanket. They buried her, then returned the shovel to Walmart for a refund, keeping the receipt.
Gary Arnold reported his wife missing that day. About a thousand people, roughly a fifth of the town, searched the fields; the Montana Army National Guard sent forty soldiers. A New Balance shoe and a hat were found in a ditch on Holly Street, with signs of a struggle in the frozen mud. Police looked at forty-one registered sex offenders living within a mile of her route, ten of them non-compliant.
The autopsy found black, gritty material in her stomach and trachea, consistent with her face having been forced into the mud. Two thousand people attended her funeral in the Sidney High School gymnasium, where a Chicago Cubs hat and flowers were placed on the casket.
A running trail in Sidney is dedicated to Sherry Arnold.
January 7, 2012 / Holly Street, Sidney, Montana; body buried outside Williston, North Dakota
As told in the episode, on 24 April 2026.
Accused
Accused
Public places are marked on the map.
crime scene
about 0:53:07business
about 0:27:13home
about 0:21:47school
about 0:16:26home
about 0:18:36police
about 0:15:03business
about 0:52:54business
about 0:55:43body found
about 0:59:00school
about 0:20:08school
about 0:20:02landmark
about 1:09:20