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Jun 30, 2026

Long Island music teacher rapes, strangles sister-in-law he lusted over for years with wife out of town: prosecutors

Long Island music teacher rapes, strangles sister-in-law he lusted over for years: prosecutors Email New York Post Read the Latest on Page Six

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Long Island music teacher rapes, strangles sister-in-law he lusted over for years with wife out of town: prosecutors

By Brandon Cruz and David DeTurris Published June 30, 2026, 7:38 p.m. ET

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A Long Island music teacher sexually assaulted and strangled his sister-in-law — whom he’d reportedly been lusting over for nearly a decade — while his wife was away on a bachelorette trip, according to police and prosecutors.

Joseph Horner, 27, killed Victoria Castle, his wife’s 25-year-old sister, at their shared North Oak Street home in North Massapequa and then called the cops on himself around 8:45 a.m. on Monday, the Nassau County Police Department said. 

Mugshot of Joseph Horner.
Joseph Horner, 27, strangled his 25-year-old in-law at their shared home in North Massapequa, the Nassau County Police Department and prosecutors said. Nassau County Police Department

Horner – a music teacher in the Oceanside School District – lived in the upstairs apartment of the multi-family house with his wife, and Castle lived in the ground-floor unit, according to the Nassau County District Attorney’s Office.

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