OCEANSIDE, N.Y. (CBSNewYork) — An 18-year-old accused in the stabbing death of another teenager is due back in Nassau County Court on Monday.

Khaseen Morris, 16, was stabbed to death when a brawl broke out outside a strip mall on Long Island.

Tyler Flach is charged with second-degree murder after police say he stabbed 16-year-old Khaseen Morris last week during a fight in Oceanside. Morris later died at the hospital.

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Dozens of onlookers stood by, recording the brawl and posting videos on social media.

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Flach has pleaded not guilty and is being held without bail.