The Iowa Division of Criminal Investigation is investigating the Sioux County Sheriff’s chief deputy. Sheriff Dan Altena says he placed his chief deputy, Randy Waterman, on paid administrative leave during the D-C-I investigation.

The sheriff is not disclosing what is being investigated. He describes it as a matter that came to his attention last week. Altena also said the investigation is ongoing and criminal charges are possible. Waterman was appointed chief deputy in January of last year. He’s worked for the department since 1991.