A 26-year-old woman was sentenced Monday to 9 to 20 years in prison for stuffing her newborn son into a plastic bag after giving birth to him at her suburban Detroit workplace.

Kimberly Pappas earlier pleaded guilty to second-degree murder under an agreement with prosecutors. She told the court she couldn't put into words her pain and regret.

Police say the baby was discovered on March 31 at Pappas' desk after his birth in the restroom of the business in Wayne County's Redford Township.

An autopsy determined the infant lived for 20 to 30 minutes and died of suffocation. His death was ruled a homicide.

The Associated Press contributed to this report.