LA CROSSE, WI (Ben Caxton) — 70-year-old La Crosse dentist Frederick Kriemelmeyer is facing years in prison after being convicted on four counts of federal tax evasion in a Madison court this week. In 2007, Kriemelmeyer was ordered to pay $135,337 to the Internal Revenue Service (IRS) for unpaid income taxes. By 2012, the IRS assessed Kriemelmeyer for more than $450,000 in taxes, interest, and penalties. Evidence showed he took a number of actions to evade paying the taxes he owed, from at least 2013 to 2015, he did not file tax returns reporting the income from his dental practice, directed his patients to pay him in cash or by check with blank payee lines, and paid his business and personal expenses with third-party checks and cash. Sentencing is set for May 19.