at 12:41 a.m; Smith followed shortly afterward and was pronounced dead at 1:19 a.m. Aftermath Hickock and Smith were both buried in nearby Mount Muncie Cemetery in Lansing, Kansas. Hickock donated his eyes for corneal transplants, and they were used on two patients in Kansas City later that day. On December 18, 2012, the killers' bodies were exhumed from Mount Muncie Cemetery, as authorities hoped to solve a 53-year-old cold case using DNA. Smith and Hickock had fled to Florida after the Clutter murders, and the two had been questioned about the December 19, 1959 shooting murder of Cliff and Christine Walker and their two young children. A polygraph administered at the time of their arrest in the Clutter case cleared them of the Walker family murders, but by modern polygraph standards, their test results are no longer considered valid. After the exhumation, officials in Kansas retrieved bone fragments from Smith and Hickock's corpses in order to attempt to compare their DNA to semen found in Christine Walker's pants. In August 2013, the Sarasota County sheriff's office announced they were unable to find a match between the DNA of either Smith or Hickock with the samples in the Walker family murder. Only partial DNA could be retrieved, possibly due to degradations of the DNA samples over the decades or contamination in storage, making the outcome one of uncertainty (neither proving nor disproving the involvement of Smith and Hickock). Consequently, investigators have stated that Smith and Hickock still remain the most viable suspects. In 2017, The Wall Street Journal uncovered a handwritten manuscript that Hickock wrote during the time that he awaited his execution on death row. The manuscript, reportedly titled The High Road to Hell, allegedly shone a light on the motive behind the murders, which to this day is in dispute. Before his execution, Hickock had insisted (and Smith concurred) that Smith committed all of the murders himself. However, Hickock's manuscript describes how he shined a flashlight on each of the four Clutters' heads while Smith fired; Hickock's only regret, according to the manuscript, was that Smith did all of the killing and Hickock personally committed no murders. In discussing his alleged motive, Hickock claimed that he had committed the killings in a murder-for-hire plot in exchange for $5,000 from a man only named Roberts, writing, "I was going to kill a person. Maybe more than one. Could I