An Alton man has been charged with possession of child pornography following a check of local sex offenders earlier this week. 36 year old Robert Ridenour of the 1200 block of West 9th Street is charged with 12 counts of aggravated child pornography after authorities allegedly found the material on his home computer.

Alton Police and U.S. Marshals conducted a compliance check this week of local sex offenders to make sure they were residing at their registered address. Ridenour was apparently compliant in living at his listed address, but police found the material as part of the search. His bond has been set at $500,000. He was convicted of predatory criminal sexual assualt following a case in 1997 in Madison County. Authorities say during the sweep on Tuesday, they found 19 sex offenders who were not living at their listed address, and will face additional charges. Thirty-nine offenders were found to be in compliance, but others are still being sought.

(WBGZ-ME)