FBI joins investigation into death of 3-year - old Riley Fox , slain in 2004 . ` It 's only been in the last few weeks that investigators have actively begun pursuing this case again , '' Zellner said , `` even though Kevin was cleared nearly four years ago . '' Riley was reported missing from school ; her body was found that day . Police initially suspected father in the killing , but DNA cleared him . Advocate for family criticized law enforcement for lack of progress on investigation .
FBI joins investigation into death of 3-year - old Riley Fox , slain in 2004 . Riley was reported missing from school ; her body was found that day . Police initially suspected father in the killing , but DNA cleared him . Advocate for family criticized law enforcement for lack of progress on investigation .