Patrick Sessions, center, and his son Jason, right, watch as Alachua County Sheriffs technicians use a back hoe Thursday, Feb. 2, 2014, in Gainesville, Fla., to dig for evidence in the 1989 disappearance of Tiffany Sessions, a University of Florida student.  The sheriffs department announced they have linked the disappearance to Paul Rowles, a serial killer who died in prison last year.   (AP Photo/Phil Sandlin)
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