Now Playing: Murder Mystery: Who Killed Farm Couple?

Now Playing: Golden Ring Turns Murder Case Upside Down

Now Playing: A Murder, Two Suspects, Two Confessions

Now Playing: Why Did Nephew Make a False Confession?

Now Playing: CSI, Stocks' Killers Serving Jail Time

Now Playing: DNA May Help Find the Identity of Who Killed Faith Hedgepeth: Part 5

Now Playing: Police Remain Confident They Will Find Faith Hedgepeth's Killer: Part 6

Now Playing: UNC Student Found Bludgeoned to Death in Her Own Apartment: Part 2

Now Playing: FBI Develops Profile of Murdered UNC Student's Killer: Part 3

Now Playing: Friends, Family Stunned to Learn UNC Student Is Dead: Part 1

Now Playing: Voicemail Found Left by UNC Student's Phone on Night of Her Murder: Part 4

Now Playing: Friend of Murdered UNC Student Describes Moment She Found Her Body

Now Playing: Daughter Celebrates Birthday For the First Time With Biological Mom: Part 6

Now Playing: Women Take DNA Test to Learn If They Are Long Lost Mother, Daughter: Part 5

Now Playing: Mom Insists She Never Abandoned Her Baby at St. Louis Hospital: Part 4

Now Playing: Mom Reunites With Daughter She Thought Was Dead For Nearly 50 Years: Part 1

Now Playing: Attorney Claims Babies Were Sold Out of St. Louis Hospital Parking Lot: Part 2

Now Playing: Evidence Suggests Woman's Baby May Have Been Abandoned, Not Stolen: Part 3

Now Playing: Undercover Agent Confronts Slain FSU Professor's Ex-Mother-in-Law

Now Playing: FSU Professor's Ex-Boyfriend Says She Told Him Brother Talked About Killing Ex-Husband