FILE 694 / 24 April 2026 / 73 MIN / express

Of Mice & Men & Murder

Sidney, MontanaListen

The town

N ↑Public placePublic placePublic placePublic placeTown centre (approximate places)
Static locations; no street basemap. Places and details. OpenFreeMap © OpenMapTiles Data from OpenStreetMap.

This is Sydney, Montana, SID NEY, in northeastern Montana by the North Dakota border, in Richland County. about 0:03:34

History, in brief

Town note

The 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 0:05:46

Town note

The following year Montana became a state and Sidney was incorporated.

about 0:06:19
All 6 history facts

Town note

The 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 0:05:46

Town note

The following year Montana became a state and Sidney was incorporated.

about 0:06:19

Town note

For a long time sugar beets were the main source of everything here.

about 0:06:23

Town note

Then the oil boom came, tapping the shale, and everything changed.

about 0:06:39

The figures, as told

Crime / national average

Drug crimes in eastern Montana
▲ more than doubled

about 0:13:18

Assaults in Dickinson, North Dakota
increased fivefold

about 0:13:29

Registered sex offenders within approximately one mile of the jogging route
41

about 0:31:23

Registered sex offenders per capita
▲ four times the national average

about 0:32:28

Registered sex offenders non-compliant with registry requirements
10

about 0:32:53

Registered sex offenders rated level three, the highest risk
1 of 41

about 0:33:01

Money

Median home value$397,100
Median household income$55,611
All figures and comparisons, as told in 2026

Population

"6,420"

No direction stated.

As told in 2026 about 0:04:47

Median household income

"$55,611"

Comparison: "national average around $70,000". No direction stated.

As told in 2026 about 0:04:59

Median home cost

"$397,100"

No direction stated.

As told in 2026 about 0:05:09

Drug crimes in eastern Montana

"more than doubled"

Comparison: "in only a couple of years". Direction: above.

As told in 2026 about 0:13:18

Assaults in Dickinson, North Dakota

"increased fivefold"

Comparison: "in two years". No direction stated.

As told in 2026 about 0:13:29

Registered sex offenders within approximately one mile of the jogging route

"41"

No direction stated.

As told in 2026 about 0:31:23

Registered sex offenders per capita

"four times the national average"

Comparison: "national average". Direction: above.

As told in 2026 about 0:32:28

Registered sex offenders non-compliant with registry requirements

"10"

No direction stated.

As told in 2026 about 0:32:53

Registered sex offenders rated level three, the highest risk

"1 of 41"

No direction stated.

As told in 2026 about 0:33:01

The reviews

3.8 / 5 · average of 4

5 stars

“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

5 stars

“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

2 stars

“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

3 stars

“There is nothing to do here and there is no reason to stay.”
about 0:09:28

In Montana

Closest episodes

  1. The Swanson Motel MurdersDickinson, North Dakota · 30 July 2022138 km / 86 miShow on map
  2. A Killer ConspiracyMinot, North Dakota · 9 February 2023223 km / 139 miShow on map
  3. Twin Marrying MadnessLemmon, South Dakota · 29 June 2024250 km / 155 miShow on map
  4. The Bloody Basement Breakfast ClubBismarck, North Dakota · 5 August 2023275 km / 171 miShow on map
  5. Baby Faced KillerMenoken, North Dakota · 7 November 2024292 km / 181 miShow on map

The story

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.

The case

Murder of Sherry Arnold

Victims

Sherry Lee Arnold (43). maths teacher at Sidney High School, wife of Gary Arnold and mother of five

Accused and outcomes

As told in the episode, on 24 April 2026.

Accused

Accused

Outcome

Other people

Gary Arnold. Sherry's husband, a teacher at Sidney High School; reported her missing and was cleared
Angel Cruz. girlfriend and mother of his son; told the FBI what had said
Harry. father, who said his son had the education of a kindergartener
Ron Whited. Sherry's father
Sharon Whited. Sherry's mother
Rhonda. Sherry's sister
Jerome Papineau. Sherry's first husband, married 1994, divorced around 1997
Jason. Sherry's son
Holly. Sherry's daughter
Tina. aunt-in-law, who described him playing video games like a child

The timeline

  1. February 13th, 1968 Sherry Lee Arnold is bornabout 0:18:31
  2. 1986 She is valedictorian of Sidney High School's class of 1986 (Sidney High School)about 0:19:14
  3. 1990 She earns her teaching degree from Dickinson State University (Dickinson State University)about 0:20:08
  4. 1994 She marries Jerome Papineauabout 0:20:36
  5. around 1997 She and Papineau divorceabout 0:20:53
  6. September 12th, 1998 She marries Gary Arnoldabout 0:21:30
  7. fall of 2011 Sherry Arnold is named KTVQ teacher of the month (Sidney High School)about 0:22:53
  8. January 4th, 2012 and leave Colorado for oil jobs in the Williston areaabout 0:39:18
  9. January 7th, 2012, before dawn Sherry Arnold leaves home for a run (Arnold home)about 0:26:20
  10. January 7th, 2012, about 6.30 a.m. She is tackled, choked and dragged into the Ford Explorer on Holly Street (Holly Street)about 0:53:24
  11. January 7th, 2012, morning Gary Arnold returns from his walk, finds her gone and reports her missing (Sidney Police Department)about 0:15:03
  12. January 7th, 2012 A New Balance running shoe and a hat are found in a ditch on Holly Street (Holly Street)about 0:17:12
  13. January 7th, 2012 About a thousand people and forty Montana Army National Guard soldiers search for her (Sidney High School)about 0:16:26
  14. January 7th, 2012 They buy a shovel at Walmart in Williston and keep the receipt (Walmart)about 0:55:43
  15. January 7th, 2012 digs a grave about three feet deep in a rural area outside Williston and they bury her (grave site outside Williston)about 0:56:58
  16. January 7th, 2012 They return the grave-digging shovel to Walmart for a refund (Walmart)about 0:57:34
  17. January 11th, 2012 An anonymous tip names and describes a green 1993 Ford Explorer (Sidney Police Department)about 0:33:36
  18. January 12th, 2012 The FBI interviews Angel Cruz, who says told her he and a man named had abducted and killed a womanabout 0:45:25
  19. March 21st, 2012 leads authorities to the body outside Williston (grave site outside Williston)about 0:58:53

Last meals

  • Sherry Arnold. black gritty unidentified material in her stomach and trachea stomach contents at autopsy, March 2012about 0:59:00

Places and phrases

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Static locations; no street basemap. Places and details. OpenFreeMap © OpenMapTiles Data from OpenStreetMap.

Places in the story

Public places are marked on the map.

Heard in this episode