A new homeowner discovers a missing man’s body in the house. A cryptic note and, surprisingly, a Pomeranian dog send investigators on a cross-country hunt for a killer. Episode Info Mark Koster Photo Courtesy of Iowa Cold Cases Mark Koster Photo Courtesy of Iowa Cold Cases John Green Photo Courtesy of Iowa Cold Cases John Green Photo Courtesy of Iowa Cold Cases John Green Photo Courtesy of the Carroll Times Herald John Green Photo Courtesy of the Carroll Times Herald Crime Scene Photos Photo Courtesy of Ben Smith Crime Scene Photos Photo Courtesy of Ben Smith Crime Scene Photo Photo Courtesy of Ben Smith Crime Scene Photo Photo Courtesy of Ben Smith Crime Scene Photo Photo Courtesy of Ben Smith Crime Scene Photo Photo Courtesy of Ben Smith Crime Scene Photo Photo Courtesy of Ben Smith Crime Scene Photo Photo Courtesy of Ben Smith John Green being interviewed Photo Courtesy of Ben Smith John Green being interviewed Photo Courtesy of Ben Smith Additional Source Material Iowa Cold Cases – Mark Edgar Koster Man convicted of killing friend, hiding body in basement of Sac City home State of Iowa v. John David Green STATE OF IOWA, Appellee, v. JOHN DAVID GREEN, Appellant.