Privacy update — September 18, 2026: Identifying details have been removed under our victim privacy policy.
What Happened
A Nassau County music teacher is set to face a sweeping new indictment after allegedly strangling his sister-in-law to death last month at their shared North Massapequa home. According to News 12 Long Island, a 27-year-old North Massapequa man — who taught at a school in Oceanside — will be indicted on two additional counts of murder and two counts of rape, as shown in court documents. The new charges come weeks after the suspect was first accused in the death of his wife’s younger sister, 25.
Prosecutors say the suspect orchestrated a pretext to get the victim alone. He asked her to help him move a piano into his apartment while his wife was not home — and then, once the victim was inside, he allegedly strangled her to death before having sex with her. Officials told News 12 Long Island that the residence on N Oak Street was a multi-family home divided into two apartments, and that the suspect, his wife, and the victim all lived at that same address — with the victim in close proximity to the married couple at the time of the killing.
The suspect has allegedly admitted to investigators that he had been lusting over his wife’s sister for years. Authorities say he told them that on the day of the killing, he saw an opportunity to follow through on what he described as his “sexual desire.” The admission, reported by News 12 Long Island, adds a layer of premeditation to the case that prosecutors will now bring before a Grand Jury.
Location & Road Context
The incident took place at a residence on N Oak Street in North Massapequa, a hamlet in Nassau County on Long Island’s South Shore. The address served as both the marital home for the suspect and his wife and as the residence of the victim — all sharing a single multi-family structure split into two units. North Massapequa sits within the Town of Oyster Bay; for other incidents and road conditions in this area, see our Nassau County coverage.
Investigation & Legal Proceedings
The suspect is scheduled to be arraigned on the Grand Jury indictment Wednesday morning, July 29, 2026, at Mineola court in Nassau County. The new charges — two additional counts of murder and two counts of rape — are on top of charges already brought against him following the victim’s death last month, per court documents reviewed by News 12 Long Island. The case was first reported by News 12, which has followed the prosecution since the initial arrest.
The expansion of charges to include multiple murder counts and rape counts signals that prosecutors are pursuing the most serious available charges under New York law for what they allege was a premeditated, sexually motivated killing. The suspect’s own alleged admissions to authorities — including his stated years-long fixation on the victim — are likely to figure prominently as the case moves toward trial.