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Mason City Today
By the People, for the People
North Iowa Woman Pleads Not Guilty to Charges After Allegedly Walking into C-Store Naked, Covered in Blood
Cheri Decker accused of causing over $10,000 in damages at Mason City convenience store
Published on Feb. 10, 2026
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A 32-year-old Mason City woman has pleaded not guilty to multiple charges, including first-degree criminal mischief and assault, after she allegedly walked into a Casey's convenience store in Mason City naked and covered in blood, causing over $10,000 in damages.
Why it matters
The incident highlights the challenges businesses and law enforcement face in dealing with individuals who may be experiencing mental health crises or other issues that lead to erratic and destructive behavior in public spaces.
The details
According to police, on December 19th, Cheri Decker entered the Casey's store on North Federal Avenue in Mason City around 9:30 am, nude and covered in blood. She is accused of knocking over shelving, breaking glass bottles, throwing items at employees, and slapping a customer and employee. Decker also allegedly covered multiple consumable items and product packages with blood, forcing the store to close for professional cleaning that cost over $10,000.
- On December 19th, Decker allegedly entered the Casey's store around 9:30 am.
- About four hours later, police were dispatched to the MercyOne North Iowa Medical Center ER, where Decker was accused of spitting on a security guard.
- Warrants for Decker's arrest were issued following the incidents, and she was apprehended on January 6th by the Cerro Gordo County Sheriff's Office.
- On February 9th, Decker entered a not guilty plea to the charges.
The players
Cheri Decker
A 32-year-old Mason City woman who has pleaded not guilty to multiple charges, including first-degree criminal mischief and assault, following the alleged incident at the Casey's convenience store.
Mason City Police Department (MCPD)
The law enforcement agency that responded to the incident at the Casey's store and the later incident at the MercyOne North Iowa Medical Center ER.
Casey's
The convenience store chain where the alleged incident took place, resulting in over $10,000 in damages.
MercyOne North Iowa Medical Center
The hospital where Decker was later accused of spitting on a security guard and acting in an assaulting manner.
What’s next
No trial date has been set for Decker's charges, but she is free awaiting trial after posting a $6,000 surety bond on January 28th.
The takeaway
This case underscores the need for improved mental health resources and crisis intervention training for both businesses and law enforcement to better address situations involving individuals who may be in distress and acting erratically in public.
