(KOMONEWS) — Sheriffs say a link on a Facebook page led them to some disturbing material, and now a Snoqualmie Valley teacher has been arrested for possessing child pornography.

Parents and children had only nice things to say about substitute teacher Ted Bernstein, but beneath the surface, detectives say something sinister was going on.

If it weren’t for Facebook, police might never have found the library of child pornography they say Bernstein had been collecting. An acquaintance of the 64-year-old teacher was looking through his personal Facebook page when a link came up that made her stop everything.

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