Vlk was last seen on Hilton Head Island, South Carolina on September 17, 1991. She stopped at a church in the 280 block of Seaside Villas while some of its members were having dinner. Witnesses reported that Vlk was crying and appeared terrified. She was barefoot and her feet were bleeding. Vlk requested a piece of cardboard and said that she wanted to create a sign and hitchhike off of the island. Vlk has never been heard from again.