The state Department of Corrections is seeking to have a Madison man who is considered a material witness in the killing of University of Wisconsin student Brittany Zimmermann returned to prison for a year.
The move to pull him off the streets appears unrelated to the murder investigation.
David Kahl, 42, has been held in jail since his arrest the night of April 2, the day that Zimmermann was found dead in her West Doty Street apartment.
Kahl is considered a material witness because, after his arrest, he provided police with the names of two men who went door to door in the Doty Street area trying to raise money by scamming people or stealing from apartments.