A New Hampshire teen who initially claimed home invaders murdered his sister-in-law and nephews, ages 4 and 1, is planning to plead guilty in their deaths, a court filing shows.

Eric Sweeney, 19, intends to admit to killing Kassandra Sweeney, 25, and her sons Benjamin and Mason, who was just a month shy of his second birthday. Sweeney plans on entering a guilty plea to three counts of second-degree murder and one count of falsifying physical evidence, the filing says . Sweeney will formally enter the plea at a court hearing on Friday, local ABC affiliate WMUR reports .

A grand jury in Merrimack County indicted Eric Sweeney for three counts of first-degree murder in the slayings, which occurred just after his 16th birthday, state Attorney General John M. Formella announced in October 2023

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