It's a Southwest Louisiana murder mystery that made headlines nationwide.
When University of Louisiana at Lafayette student Mickey Shunick vanished last summer, her sister became the tip of the spear in the multinational search effort.
Shunick's sister opens up to "Dateline" about the case and the night Mickey went missing.
Look for a special Tuesday edition of Dateline NBC on KPLC.
The show airs Tuesday at 9 p.m.