PETALUMA (KRON) -- It now appears the only person ever arrested in connection with the murder of Jon Benet Ramsey once taught in Petaluma schools. The Sonoma County district attorney's office is now confirming 42-year old John Mark Karr was charged with possession of child pornography in April, 2001. Other reports indicate Karr served as a substitute teacher in the Petaluma elementary school system. Prosecutors say Karr failed to show in court in December, 2001. He's been a fugitive ever since. Thai police arrested Karr Wednesday in connection with the Jon Benet Ramsey case. The little girl was found dead...