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Keith R. Mackie, 44

Summary by RiverheadLOCAL
Keith R. Mackie, formerly of Riverhead, died March 4, 2026, at home in Mattituck. He was 44 years old. Born Sept. 16, 1981, in Riverhead, he was the son of Judith A. (Karjewski) Chasse and Frank W. Mackie. In his professional career, he worked as a branch manager for MCN Distributors in Riverhead. He was predeceased by his father, Frank. He is survived by his children… Source
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RiverheadLOCALRiverheadLOCAL

Keith R. Mackie, 44

Keith R. Mackie, formerly of Riverhead, died March 4, 2026, at home in Mattituck. He was 44 years old. Born Sept. 16, 1981, in Riverhead, he was the son of Judith A. (Karjewski) Chasse and Frank W. Mackie. In his professional career, he worked as a branch manager for MCN Distributors in Riverhead. He was predeceased by his father, Frank. He is survived by his children… Source

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RiverheadLOCAL broke the news in on Monday, March 9, 2026.
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