MINNEAPOLIS (WCCO) – An Andover man was sentenced Friday to more than 15 years in prison after pleading guilty to unintentionally killing his girlfriend’s young son in September of 2011, court documents show.

Anoka County Judge Kristin Larson sentenced Anthony Urban, 26, to 190 months in prison after he pleaded guilty to unintentional second-degree murder in April 2012.

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The charges stem from the Sept. 4, 2011, death of a 3-year-old boy, whom authorities say was severely abused by Urban.

The boy’s mother, 40-year-old Elizabeth Moorman, brought the child to Mercy Hospital on Sept. 2, 2011.  Doctors quickly found the boy had suffered severe head trauma, punctured lungs and had many bruises all over his body. He was airlifted to the Hennepin County Medical Center, and later died.

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After the Anoka County Sheriff’s Office learned of the boy’s condition, it began an investigation.

When questioned, Urban said he hit the boy in the head while helping him brush his teeth. He said that the boy fell off a stool and hit his head on the floor.

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He said that he did not bring the boy to the hospital or call 911 because the boy’s mother told him not to for fear she’d be arrested on outstanding warrants, according to the criminal complaint.