An Edmonton school custodian has been charged with accessing and possessing child sexual exploitation materials. Crispolo Comillas, who may have been known as Cris, was arrested at his home on June 18. Police believe the offences were committed online. The forensic analysis of his electronic devices has not been finished. Comillas, 47, had been working at Louis St. Laurent Catholic Junior/Senior High School. He was released under a number of conditions and is due in court on July 6. The investigation began with a tip to the National Centre for Missing and Exploited Children about someone in Alberta sharing abusive materials on the internet. Anyone with information about the case is asked to contact local police or Crime Stoppers.