Authorities say it could be weeks before DNA testing is complete on a suspect in the unsolved killing of a University of Oklahoma student. Oklahoma City police say they have an unconfirmed DNA match linking a 25-year-old man to the 1996 rape and murder of Juli Busken. DNA from evidence at the crime scene was entered in a national DNA database. The Oklahoma State Bureau of Investigation notified Oklahoma City police yesterday of a possible match. The man is serving time in an Oklahoma jail but hasn`t been charged in the Busken case and authorities would not release his name. Cleveland County District Attorney Tim Kuykendall says he`s confident Busken`s killer has been found.