A special two hour edition of Dateline Friday night featured the high-profile case of Michelle Le.
The episode also featured never before seen video of her convicted killer, Giselle Esteban, in the interrogation room.
Michelle Le disappeared from her nursing job in Hayward in 2011. Her body was found four months later.
"Dateline" said it was intrigued by this case because of the remarkable efforts by Le's family, search teams, and investigators.
Friday night's episode also talked in great lengths about electronic evidence, now used in prosecuting many murder cases.