A Hannibal man enters a guilty plea in the shooting death of a Hannibal convenience store clerk last October.

Gary Wiltermood entered a guilty plea to second degree murder as part of a plea deal. Wiltermood is sentenced to 20 years in prison. Wiltermood was charged in the Oct. 8 shooting death of 61-year-old Adrienne Arnett.

A second man arrested in connection to the case plead guilty to second degree murder charges in June. Michael Studer was sentenced to 25 years in prison.

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