Kansas couple Mike Sisco and Karen Harkness are found deadby their parents before a family fish fry in 2002. A years-longsearch for evidence and three criminal trials over two decadesreveal strained dynamics within one victim's family.INTERVIEWSWITH: Mike Sisco's mother Carol Sisco, daughter Hailey Seel,sister Cathy Boots and brother-in-law Mark Boots; KarenHarkness' daughter Erin Harkness Sutton and son Chad Harkness;Fmr. Topeka police Sgt. Richard Volle; Shawnee County DistrictAttorney Mike Kagay; and others.