The Knoxville Police Department has a new officer on the streets. Officer Austin Willits officially joined the force on Monday. Willets comes to Knoxville from Aston, Iowa, which is located in Osceola County in the northwest part of the state. The Department has seen several new officers in the past six months or so due to a combination of new positions being added and some turnover. The department will still look to add one more officer soon, as Officer Randy Puyear plans to retire at the end of the month.