A man who police say was one of the last people to see Evelyn Miller alive was arrested Thursday for interfering with the investigation into the girl's slaying.
Dan Slick, 27, of Charles City, pleaded not guilty to two counts of making false statements to federal agents and was released with several conditions, including maintaining mental health counseling. No monetary bond was set.
"The investigation has turned an important corner," Floyd County Attorney Marilyn Dettmer said in a statement.
Other people have also lied to investigators, and "we will not tolerate their actions," she said. "They have impeded our investigation into the murder of an innocent child, and we will seek justice."
Miller, 5, disappeared from her home in nearby Floyd on July 1 last year, setting off a massive manhunt that culminated July 6 with the discovery of her body on the banks of the Cedar River. Officials ruled her death a homicide but had not made any arrests until Thursday.
Slick, unshaven and sporting a goatee, was whisked away in handcuffs by federal marshals after the hearing in U.S. District Court. Wearing a blue T-shirt that read, "I don't suffer from insanity, I enjoy every minute of it," Slick appeared calm and said few words. His court-appointed attorney said he had no comment.