Crime Solvers Central
Crime Solvers Central
302 Cases Solved. Advancing justice for missing persons, unsolved homicides, unidentified and unclaimed remains.

Case Description

Any updates on this case? Let us know!
Summary based on the NamUs case record (MP8480) and 6 other sources
William Clark Crumpacker, a 37-year-old marketing manager for Dell, disappeared under mysterious circumstances on March 16, 1998, while spending the night on his boat with his two young sons at Lake Travis, Texas. That evening, after telling his children he was going for a swim to clean off, he left the boat but never returned. The next morning, his sons found their father missing, and a blue bath towel was discovered partially wrapped around a bush on the shore, indicating that Crumpacker may have reached land after his swim.

Despite being an experienced boater and swimmer, Crumpacker is believed to have succumbed to hypothermia in the 55-degree water and drowned. His boat was anchored near Little Devils Cove, with both of its batteries dead, and the water around the area was about 35 feet deep. Although his body was never recovered, the evidence suggests a tragic swimming accident.

Crumpacker had previously worked for Compaq in Houston before moving to Austin. His disappearance remains unsolved, with authorities continuing to classify his case as a "Lost/Injured Missing" incident.

Last Seen: Apr 3, 1998

Possible Unidentified Matches (2)

Unidentified remains cases whose details are consistent with this person, ranked by how closely they compare. Fields that are unknown in either case are left out of the score.

81%Moderate
John Doe — Austin, Texas - unidentified case UP8560
John Doe — Austin, Texas
UP8560 • Found May 27, 1998
View case
Sex ✓Male
Age 77%Est. 20–35 vs 37
Race 100%White
Location 99%15 mi away, same county
TimingFound 8 weeks after last seen
Height 84%6'1" vs 6'3"–6'6"
Weight 52%153 lb vs 225–235 lb
Hair 100%Brown vs Brown
Eyes 100%Hazel vs Hazel
76%Possible
John Doe — Del Valle, Texas
UP7079 • Found Feb 17, 2003
View case
Sex ✓Male
Age 100%Est. 35–50 vs 37 when missing
Race 100%White
Location 97%21 mi away, same county
TimingFound 5 years after last seen
Hair 60%Black vs Brown

These comparisons are generated automatically from public NamUs case data and are not confirmed identifications. Only DNA, dental or fingerprint comparison by investigators can confirm an identity. If you believe two cases are connected, contact the agency handling the unidentified case.

Unidentified photos are blurred because many are post-mortem. Tap a photo to reveal it.