(Longview, WA)  --  A 17-year-old boy is under investigation for animal cruelty after being accused of killing and skinning a pet goat.  Authorities in Longview say the boy was 16 last June when he allegedly zip-tied the goat's hooves together and slit the animal's belly before partially skinning it.  Three other goats and a sheep on the Beacon Hill property in Longview were unharmed.  Police say the teen has confessed to the crime.