The investigation reveals a decades-old secret: Tommy Grazetti actually died years ago of natural causes, and Ledo Wright assumed his identity to avoid the Vietnam War draft.
The episode is noted for its emotional weight on Greg and its exploration of "Old Vegas" lore. [S13E4] It Was a Very Good Year
Forensic evidence, including rare Frank Sinatra vinyl tracings found on Alison's body, leads the team to a Sinatra impersonator. The Resolution The Resolution The killer is revealed to be
The killer is revealed to be the at a local Rat Pack tribute club. He had become obsessed and unstable, eventually murdering Alison over a rare record she had purchased—ironically, a gift she intended to give to Greg. The body was dumped in the desert by a terrified delivery driver who found her while performing scheduled maintenance on the piano. [S13E4] It Was a Very Good Year