Becky Riiser, 38, of Wausau, pleaded no contest Thursday to three misdemeanor disorderly conduct charges and was fined after prosecutors agreed to reduce the original felony charge of placing a foreign object in food, the Wausau Daily Herald reported Monday.
Riiser admitted to investigators she had placed cookies laced with ex-lax outside the office door of University of Wisconsin Marathon County biology Professor Aruni Pehl-DeSilva in December 2009. The professor became ill after eating one of the cookies, prosecutors said.
"It was supposed to be a stupid, practical joke," Riiser wrote in a January 2010 apology letter to Pehl-DeSilva. "It was something I didn't think through."
Marathon County Circuit Judge Greg Huber called Riiser's actions "demeaning."
"The cruelty of [the act] is uncalled for," Huber said to Riiser. "For someone of your maturity, [this] was totally unexpected."
Notable deaths of 2014 [PHOTOS]