Federal agents and Suffolk police seized more than 5 kilograms of fentanyl, 750 grams of cocaine, 15 pounds of marijuana and two assault rifles while executing search warrants Tuesday morning at four locations across Long Island, a detention memo filed by federal prosecutors following the arrest of a West Babylon resident shows.

Officials from the FBI, IRS-Criminal Investigation and the Suffolk County Police Department arrested Kingsley O. McDonald, 41, on Tuesday morning in connection with the search warrants. The arrest follows a two-year investigation dating back to September 2023, according to the memo, which said McDonald, 41, netted more than $20,000 selling fentanyl to law enforcement agents.

McDonald, charged with two counts of conspiracy to distribute fentanyl, pleaded not guilt

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