Alex Baber co-founded Cold Case Consultants of America with is wife, herself a victim of an abduction that remains unsolved. Using a database of hundreds of letters from serial killers to try to discover new evidence to solve cases that went cold years ago.
http://accesswdun.com/article/2021/12/1063334/listen-alex-barber-co-founder-of-cold-case-consultants-of-america