MILWAUKEE (CBS 58) -- A Milwaukee County Sheriff's Deputy pleaded guilty to disorderly conduct after Department of Justice special agents spoke with him during a sex sting. 

According to the criminal complaint, Deputy Joel Streicher responded to an internet ad known for prostitution under the "women seeking men" section. An agreement was made for a sexual act for money by text message. The Deputy also called and spoke with an undercover officer regarding the transaction. 

The undercover officer and Deputy arranged to meet but the Deputy did not show up. Police used tools to determine the Deputies identity and a special agent that worked closely with the Deputy confirmed it was his voice on a recording. 

The Milwaukee County Sheriff's Office says "the conduct of this employee is currently subject to an internal investigation."

Court records show Streicher pleaded guilty to the disorderly conduct charge on Monday, April 8.