ALLEGHENY COUNTY, Pa. —

A school custodian from Allegheny County has been placed on leave after an investigation found he allegedly possessed thousands of images and videos of child sex abuse material.

Michael Siar, 55, is facing 22 counts of possession of child pornography and three counts of criminal use of a communication facility. Advertisement

Siar was placed on leave at the Baldwin-Whitehall School District the day authorities executed a search warrant.

According to authorities, an investigation began on April 23, after officials received 13 cyber tips identifying Siar as someone who may possess child sex abuse material.

His devices were seized from his home in May following the execution of a search warrant. Authorities say they found thousands of images and videos "of young c

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