(Dallas, TX) -- The aunt of a man accused of killing two people in Portland is coming to his defense. Gwendolyn Dixon of Dallas, Texas, says she doesn't believe Colby Robinson was a killer because he had a good personality. Dixon says her nephew was visiting Portland last week for his birthday. Robinson, who was shot and killed Tuesday by police in a Dallas suburb, is accused of killing 33-year-old Gary Pham and 41-year-old Susie Chang, and critically wounding 35-year-old Andrew Pham, at an apartment in Southeast Portland on April 10th.