The graves of Perry Edward Smith, right, and Richard Eugene Hickock, left, sit on a sloping hillside at the Mount Muncie Cemetery, Tuesday, Dec. 4, 2012, in Lansing, Kan. Smith and co-defendant Richard Eugene Hickock, the two men who were the subjects of Truman Capote's iconic book "In Cold Blood," were executed in April 1965 at the Kansas State Penitentiary for the killings of four members of the Herbert Clutter family in Holcomb, Kan. A Florida detective wants to exhume their bodies because he believes there’s evidence linking them to similar murders of a Florida family. (AP Photo/John Hanna)

The graves of Perry Edward Smith, lower left, and Richard Eugene Hickock, lower right, sit on a sloping hillside at the Mount Muncie Cemetery, Tuesday, Dec. 4, 2012, in Lansing, Kan. Smith and co-defendant Richard Eugene Hickock, the two men who were the subjects of Truman Capote's iconic book "In Cold Blood," were executed in April 1965 at the Kansas State Penitentiary for the killings of four members of the Herbert Clutter family in Holcomb, Kan. A Florida detective wants to exhume their bodies because he believes there’s evidence linking them to similar murders of a Florida family. (AP Photo/John Hanna)

FILE - In this Jan. 6, 1960 file photo, Perry Edward Smith is led by police officers into the courthouse at Garden City, Kan. Smith was arrested in Las Vegas and charged with first degree murder in the slaying of four members of the Herbert Clutter family at their farm house in Holcomb, Kan. Fifty years ago, the Clutter murders inspired Truman Capote to write "In Cold Blood". A Florida detective wants to exhume the bodies of Edward Smith and accomplice Richard Hickock to see if there is evidence linking the two men to the 1959 murders of four in a rural community south of Sarasota. (AP Photo/William Straeter, FILE)

The grave of Perry Edward Smith sits on a sloping hillside at the Mount Muncie Cemetery, Tuesday, Dec. 4, 2012, in Lansing, Kan. Smith and co-defendant Richard Eugene Hickock, the two men who were the subjects of Truman Capote's iconic book "In Cold Blood," were executed in April 1965 at the Kansas State Penitentiary for the killings of four members of the Herbert Clutter family in Holcomb, Kan. A Florida detective wants to exhume their bodies because he believes there’s evidence linking them to similar murders of a Florida family. (AP Photo/John Hanna)