Seattle police looking for witnesses in deadly robbery

DAWSONKILLERS WANTED IN SEATTLE -- Seattle detectives are hitting a road block in an unsolved murder case. Patrick Dawson died earlier this year from the beating police say he took when he was robbed in downtown Seattle. The killer's -- who Dawson told police was two black males -- have not been caught. The only known witness to the attack, Kimberely Vaughn, has since killed herself. So, Seattle detectives ask anyone who knew Patrick Dawson, saw him get attacked, or know anything else about his case, call Seattle police homicide detectives at (206) 233-5000