(Portland, OR)  --  A 16-year-old boy is facing an assault charge in the stabbing that left a 17-year-old in critical condition.  Police say Geavony Amor Ferreira is accused of beating and stabbing the victim during a brawl involving about 20 youths at the Hollywood Transit Center on Northeast Halsey Street Monday.  Ferreira is charged with first-degree assault and will be tried as an adult.  Authorities say the 17-year-old victim suffered multiple stab wounds.