Missing Since: 2004-04-08 Location: Las Vegas, Nevada
Heissenberger was last seen walking away from Lake Mead at Lake Mead National Recreation Area off of Northshore Drive near mile marker 8 in Las Vegas, Nevada on April 8, 2004. His bronze 1999 Mazda B-2500 truck was later found abandoned at the park. It was locked and his watch, wallet, and sneakers were inside. An extensive search of the Lake Mead area turned up no sign of Heissenberger. His case remains unsolved. Investigating Agency National Park Service 702-293-8998 Source Information NamUs The Las Vegas Review-Journal Updated 1 time since October 12, 2004. Last updated November 22, 2004.