Heather Elvis is one of three high profile missing person cases in Horry County dating back to 2007.
Kareem Ward was last seen in Aynor on June 16, 2007.
Brittanee Drexel vanished during spring break in Myrtle Beach in 2009.
This year Zachary Malinowski went missing in Aynor, and the search continues for Heather Elvis, who disappeared last week.
The CUE Center for Missing Persons based out of North Carolina, is a nationwide organization where people volunteer their time to search for missing people.
Monica Caison is the founder of CUE, and says each day there is new hope for those missing.
"I was probably down not even three months ago doing stuff with (for) Brittanee. I mean there's always things that come up and when we're back in town and we don't have a search going on, I'll revisit the ares and scout them out," said Caison.
The organization is made up of about 10,000 volunteers.
Caison says they get anywhere from 850 to 1,300 new cases a year.
"I mean you can't never give up, you just have to continue to look, and as information comes up whether through law enforcement or other things, there's always another place to look," said Caison.
As volunteers search the Peachtree Landing area in Socastee for Heather Elvis, Caison also makes sure to remember the cold cases that have yet to be solved.
"When we're out searching these areas, we're not just searching for the one missing person, we're always thinking of all the cases that we have out in that area. Everything means something," said Caison.