The whereabouts of a 27-year-old prison escapee remained unknown on Monday, with a weeklong search involving some 6,600 police officers on a small forested western Japan island failing to nab the convicted thief.Hiroshima and Ehime prefectural police have been pursuing Tatsuma Hirao on Mukaishima Island in the Seto Inland Sea since his escape on April 8 from a prison in the city of Imabari.Police searchers have come up empty despite Hirao leaving clues of his whereabouts including fingerprints on cars he has broken into and on trash left over from confectionary and milk products he has cons…READ FULL ARTICLE