Retired Portland police detective Daniel Young testifies in day 4 of the post-conviction review hearing of Anthony Sanborn. Sanborn is fighting to keeping his freedom after being released from prison in April. Sanborn was convicted in 1992 for the murder of Jessica Briggs. Young interviewed a witness Glen Brown who says he saw Sanborn the day after her body was found. He says Sanborn said he argued with Briggs but denies any involvement in her murder. We will continue to update the story.