Metro

Boston man sentenced to life in prison for 2012 murder

A Boston man has been sentenced to life in prison after pleading guilty to stabbing his 72-year-old neighbor to death in their Dorchester apartment building in 2012, officials said.

Tu Nguyen, 31, pleaded guilty Tuesday in Suffolk Superior Court to second-degree murder. He was sentenced to life in prison, followed by a 10-year sentence for burglary, and will become eligible for parole after serving 25 years, according to the Suffolk district attorney’s office.

Boston police responded to reports of a person breaking into the victim’s Codman Hill Avenue apartment at 1:45 a.m. on Feb. 21, 2012. Upon arrival, officers discovered the owner, Mary Miller, mortally wounded.

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Recovered security camera footage appeared to show Nguyen entering the residence. He was arrested by police later that morning at his upstairs apartment.

Nguyen was initially committed to Bridgewater State Hospital, but was later determined to be competent to stand trial, officials said.

Catalina Gaitan can be reached at catalina.gaitan@globe.com. Follow her on Twitter at @catalina_gaitan.