A Mount Pleasant man who conspired to distribute meth and illegally possessed a firearm pled guilty this week in federal court in Sioux City.

Thirty-one-year-old Seann Mackey, from Mount Pleasant, admitted that between June 2024 and December 2024 he was involved in a conspiracy that distributed at least 1500 grams of mixed methamphetamine which contained at least 150 grams of pure methamphetamine.

On December 20, 2024, law enforcement apprehended Mackey after he operated a motor vehicle in a high-speed chase in Sioux City. Then during a foot pursuit, Mackey was observed throwing a firearm. Law enforcement seized methamphetamine, numerous empty baggies and a digital scale from Mackey, along with a Glock 9mm handgun. 

Mackey had three prior convictions for drug offenses, and a conviction for possession of a firearm by a felon. Each of these convictions prohibit Mackey from possessing any firearm and also enhance his sentencing penalties. 

Mackey remains in custody of the United States Marshal in Woodbury County pending sentencing. He faces a mandatory minimum sentence of 10 years’ imprisonment and a possible maximum sentence of life imprisonment, a $8,250,000 fine, and at least eight years of supervised release following any imprisonment.