MADISON, Wis. -

The sentencing of a Watertown man marks the 23rd sentencing in a long-term case involving cocaine trafficking in Jefferson County.

Kevin Sobrolske, 48, was sentenced Thursday to one year of probation. U.S. District Judge Barbara B. Crabb noted that Sobrolske avoided a prison term because he had not committed any new crimes since withdrawing from the conspiracy in 2008 and his conduct was limited to pooling money so he and others could use cocaine.

The drug investigation began in November 2007.

Two individuals indicted for their role in the case remain at large: Celestino Velazquez-Rodriguez and Emmanuel Pineda-Gonzalez.

Prosecutors said about 8,000 calls from Watertown and Janesville were monitored by law enforcement between February and June 2008 in which members of the conspiracy were overheard conducting drug transactions and making arrangements to facilitate the sale of large amounts of cocaine.

On June 19, 2008, law enforcement officers executed 11 search warrants, resulting in the arrest of several defendants in Watertown, the seizure of over $100,000, several vehicles, and multiple kilograms of cocaine.