Venice, Florida -- Five years ago Monday, Sandra Prince, a social worker from Temple Terrace, was reported missing from her home.
What happened to the 59-year-old and where she may be remains a mystery.
About a dozen of her closest friends, going back to their days at Florida State University in the 1970's, gathered a home in Venice on Sunday.
"Just talking about her, reminiscing about old times, and just never giving up hope," said one of her friends, Susan Horton.
Investigators believe Prince was murdered, but her body hasn't been found and no one has been arrested.
At this point, friends just want answers.
"I don't believe that she's alive. I really don't. I think her life was taken at that time," said longtime friend Jerry Horton.
Prince's boyfriend, Earl Pippin, has long been labeled as a person of interest by Temple Terrace police.
In 2007, detectives searched a South Tampa home they say he built around the same time she vanished.
"That was the last tangible evidence where hope was really very bright," Susan Horton said.
Five years later, friends continue to seek the one clue that could put the puzzle together.
"We believe that someone knows something," Susan said.
Pippin did not respond to attempts to reach him.
Friends of Prince say they've talked with Temple Terrace police in the last few days, who tell them the case is still open and actively being worked on.
Adam Freeman, 10 News