In 2012, the
Sarasota County Sheriff's Office began investigating possible links between the Walker family murders and
Perry Smith and
Richard "Dick" Hickock, who had been convicted and executed for the 1959 murders of the
Clutter family in
Holcomb, Kansas. The Clutter murders were the topic of
Truman Capote's 1965 best-selling
true crime book
In Cold Blood. While that book devoted several pages to the Walker case, it dismissed a possible connection to Hickock and Smith, asserting that the two men had an alibi for that day. However, records and witness accounts collected by Kansas and Florida investigators show several factual contradictions in Capote's account. The Sheriff's Office admitted that Hickock and Smith had been considered suspects as far back as 1960. After killing four members of the Clutter family in Kansas, 34 days before the Walker murders, Smith and Hickock fled to Florida in a stolen car, and were spotted at least a dozen times between Tallahassee and Miami. Hickock's and Smith's bodies were exhumed and DNA extracted. Kansas authorities stated that they would process the DNA samples with active cases taking higher priority, and that results would take "weeks or months." In August 2013, the
Sarasota County Sheriff's office announced they were unable to find a match between the DNA of either Perry Smith or Richard 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. However, based on the personal items that were stolen,
Katherine Ramsland, a
forensic psychologist at
DeSales University, finds Smith and Hickock unlikely and instead suspects that the killer knew at least one member of the Walker family. The Walkers' marriage certificate, which was reported stolen, had turned up among items given to Cliff Walker's niece by a relative in 2013. Said relative was later proven innocent through DNA testing. ==2023 developments==