She somehow just cleaned up all her own DNA, but left the other DNA intact, lol, brilliant. This is absurd. They have the killer. He’s in jail.
Why would she have left DNA at all? What form? Spit? Blood? What are the odds that any other kid in Europe, Asai, or here on a foreign education year abroad would be involved in the brutal murder of a roommate? A zillion to one. Guilty. You’re wrong.