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Long Island Sisters Charged With Gang Assault in Stabbing of Man Protecting His Sister

Investigators are assessing whether the gang‑assault statute’s accomplice requirement fits the case.

Overview

  • The suspects were identified as Myia King-Harrison, 19, and Diamond King, 18, who were arrested Sunday and charged with first-degree gang assault and first-degree assault.
  • Police and family members said the stabbing occurred around 10:20–10:30 p.m. Saturday outside a home in Mastic as 21-year-old Nico Cassetana stepped in to defend his 14-year-old sister.
  • Cassetana was airlifted to Stony Brook University Hospital, underwent multiple surgeries, and remained in a medically induced coma on Monday, according to his family.
  • Authorities said the sisters initially fled; News 12 reported footage of the victim calling 911 moments after he was stabbed.
  • The victim’s father alleged prior bullying of his daughter by a group of girls, and prosecutors’ charging decisions could be affected by the legal requirement that gang assault involve aid from two or more other persons.