ROCKFORD – A McHenry County sheriff’s sergeant accused of sexually assaulting a child has been arrested again, this time on federal charges that he produced child pornography and distributed it over the Internet.

Gregory M. Pyle, 36, who has worked for the sheriff’s office for more than 10 years, was taken into custody Tuesday and ordered held without bond until a detention hearing Friday. Formerly of Crystal Lake, Pyle has been living in Crest Hills, near Joliet.

Pyle, who had been head of the evidence division since June 2010, was relieved of his law enforcement duties and placed on administrative leave shortly after his first arrest in January.