KNOXVILLE, Tenn. (WVLT) -- Gone without a trace, and it's been four years. The family of Derek Funk is begging for help to find out what happened to their son.
Derek Funk was driving home on a may night four years ago and vanished without a trace. He was on the phone with his girlfriend and that cell signal was the last sign of him. Now his family wants help.
Pictures of Derek Funk sit on his family's mantle in Oak Ridge where his dad is hoping the 19 year-old will return. Theyr'e not so sure he'll ever come home. Derek's dad Kevin Funk says, "Our hope is that someone will speak up."
They think someone murdered Derek, but police have no evidence of foul play. Kevin Funk says, "He just disappeared. W e can't find his truck so it's difficult for investigators to have much to go on."
Kevin wants other agencies to step in and help investigate his son's case. Funk says, "I'd like to see the TBI to come in. They would put resources on it and to me I think it could be solved fairly quickly."
Kevin tells me there is a 10 thousand dollar reward, but he believes the state should offer more reward money. Knoxville police detective Phyllis Tonkin has spent many hours on the case since day one.
She has a few leads, but needs someone who knows something to call in.
Phyllis Tonkin says, "Do I think there are people out there who know what happened to him? Absolutly. We're looking for a few more pieces of the puzzle. We will solve this case and have justice for Derek. "
Kevin Funk says not knowing what happened is the worst, even worse than knowing Derek is dead. If you call with information, you can remain anonymous.