Attorneys for convicted killer Wayne Williams, long reputed to be the man behind Atlanta’s infamous child murders, are asking a Fulton County, Ga., judge for permission to perform DNA testing on 25-year-old evidence.

On Tuesday, Williams’ defense lawyers John R. “Jack” Martin and Lynn H. Whatley filed a motion in Fulton County Superior Court seeking comparative DNA tests on samples of animal and human hair recovered from the bodies of 11 men and boys whose deaths were attributed to Williams.