Heather Cameron, 28, was last seen August 18, 2012, near the Keswick Dam in Shasta County, California. That afternoon she made three frantic 911 calls saying she’d been drugged with heroin and needed help; the calls were placed from her ex-boyfriend Daniel Lusby’s phone and a male voice can be heard in the background. Reception was poor in the remote area and the calls dropped several times.

An extensive search of the dam area turned up no sign of Heather. Her gray 2003 Chevrolet Silverado and her phone have never been recovered. Her estranged husband did not report her missing until two weeks after she vanished. Heather had a history of drug abuse, but her family says it would be out of character for her to cut off contact with her four children.

Her disappearance is officially classified as suspicious and remains unsolved. If anyone saw Heather near Keswick Dam on August 18, 2012, or has information about her phone or truck, please come forward.