A school bag found during the search for Philip Cairns will be examined for DNA evidence.
30 years after the 13-year-old disappeared in Rathfarnham, Gardaí are now looking into the possibility that Philip may have been abducted by a convicted sex offender.
It comes after a woman
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The 13-year-old went home from school home during his lunch break, but never returned.
It is understood Gardaí interviewed convicted sex offender Eamon Cooke in connection with the case before he died last week.