Miller is accused of masturbating while watching pornography in front of a boy, police reported.
A state employee reported the alleged abuse to police after the boy disclosed it took place from June 2010 to April of this year, the affidavit shows.
Since the boy made the allegations, two women have reported similar allegations of abuse by Miller when they were around the same age as the boy, police reported.
The women said the man made them watch while he performed lewd acts while looking at pornography, and the behavior progressed to sexual abuse, the affidavit states.
A search warrant was served on Miller's home, and his computer was seized. OSBI recovered 449 pornographic images, police reported.
During an interview with police, Miller acknowledged a problem with Internet pornography, according to the affidavit.
Contributing: Staff writers