A retired Mesa police sergeant has pleaded not guilty to charges of child molestation and sexual exploitation of a minor.
Russell Millsaps entered the plea Monday morning in Maricopa County Superior Court.
Mesa police say the arrest of Millsaps last month was part of an interstate federal child-pornography investigation.
Court documents show the case against Millsaps stems from pornographic images that authorities discovered on his cell phone. He is charged with six counts of child molestation and two counts of sexually exploiting a minor.
Authorities say Millsaps was a longtime patrol sergeant who retired from the Mesa Police Department in 1995. He had worked as an officer for more than 25 years.