ST. LOUIS COUNTY, Mo. - A lawsuit filed Tuesday in St. Louis County claims that a defective Sleep Number bed caused injuries that ultimately led to the death of a Metro East mother.

Angela Moan filed the lawsuit on behalf of her mother, Rosalind Walker, who died in April 2023.

The lawsuit accuses Sleep Number retail company and Legget & Plant, Inc. manufacturing company of negligence and strict liability in connection with Walker's death, while Sleep Number is also accused of breach of warranty.

According to court documents obtained by FOX 2, on March 1, 2023, Walker became trapped between her Sleep Number bed and a bedroom wall. Court documents allege that the bed's adjustable foundation was in a raised position and that the bed unexpectedly "lowered without warning."

After that, Walker was reportedly stuck between the bed and her bedroom wall for two days until first responders freed her from entrapment. She was sent to a hospital for treatment and died nearly a month later.

According to the lawsuit, Walker purchased the bed in October 2014 in Brentwood, Missouri, with a 25-year warranty.

The lawsuit contends that Sleep Number and Leggett & Platt failed to provide instructions about potential risks and lacked safety features, such as audible warnings or physical release mechanisms, to prevent entrapment.

The negligence claims allege a breach of duty in designing, manufacturing, and marketing Sleep Number beds, while the strict liability claims argue the bed as inherently "defective" and "more dangerous than an ordinary customer would expect."

The lawsuit also asserts that Sleep Number violated an implied warranty, stating that the company is responsible for "ensuring the goods sold are fit for the ordinary purposes for which such goods are used."

The lawsuit seeks compensation of at least $25,000, in addition to compensation for Walker's predeath injuries and medical expenses.