(Portland, OR)  --  Police are searching for a thief accused of stealing a tractor from a recently shuttered garden center in Happy Valley.  Owner Richard Barhoum of George's Garden Center says he got a call from a neighbor Saturday saying his garden center's gate was wide open.  Barhoum reported to the nursery to find his tractor gone.  Barhoum says the tractor has sentimental value and even has his grandkids' initials carved into it.  Anyone with information is urged to contact police.