MARSHFIELD, Wis. — A central Wisconsin woman has been sentenced to nine months in jail for spiking her supervisor’s coffee with anti-anxiety medication, eye drops and other substances.

Fifty-six-year-old Karen Zenner, of Spencer, told investigators she spiked the coffee in hopes her boss would forget about the $2,000 he loaned her. Zenner pleaded guilty to a felony count of putting foreign objects in edibles. WAOW-TV says the supervisor, a diabetic, noticed high spikes in his blood sugar and a slimy substance in his coffee.

Court records say Zenner told investigators she placed the substances in the coffee for two to three weeks in January, trying to make her boss sick so he would forget about the loan.

Zenner was also sentenced to three years of probation Monday in Marathon County Circuit Court.

Information from: WAOW-TV,

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