William Buehler, 69, appeared before a District Judge Wednesday. Prosecutors say Buehler communicated with someone he believed to be a 14-year-old girl between May 1 and July 10, in an alleged effort to commit an unlawful sex act.
When he arrived in Hiawatha for a prearranged meeting, he was met instead by officers.
Buehler is being held in the Brown County Jail under $150,000 bail. A prelminary hearing is scheduled July 19.