Burke Ramsey is pushing investigators to lean harder on DNA evidence in his sister JonBenét's 1996 murder, telling reporters he believes it's the clearest path to finally identifying her killer, according to TMZ. An unidentified male DNA profile found on JonBenét's clothing — the same sample that cleared wrongly accused suspect John Mark Karr — has sat in the national CODIS database for years, and Boulder police say they continue to check it for new matches. No charges have been filed in the case, which remains open.