SCRANTON, Pa. — A teenager has been sentenced to seven to 20 years in a stabbing death last year in northeastern Pennsylvania that authorities said stemmed from an online feud.

Seventeen-year-old Cathleen Boyer was sentenced Wednesday after pleading guilty to third-degree murder in July.

Boyer was 16 at the time of the May 2016 stabbing death of 18-year-old Kayla VanWert in Scranton.

Authorities in Lackawanna County said they fought after meeting in an alley to settle a feud on Facebook over the father of VanWert’s 1-year-old daughter.

Defense attorneys had contended that Boyer acted in self-defense.

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