Across
- 3. - Prison island with famous escape attempt
- 5. - Organized effort to find someone
- 8. - Money demanded for hostage release
- 12. - Missing Teamsters union leader
- 14. - Vanished without explanation
- 15. - Skyjacker who jumped with ransom money
- 17. - Human remains often found years later
- 18. - Aviator who disappeared over Pacific
- 19. - Unexplained or puzzling event
- 20. - Disappeared completely
Down
- 1. - Secret code or message
- 2. - Case without resolution
- 4. - Potential clue in investigation
- 6. - Illegal seizure of vehicle or aircraft
- 7. - Type of case gone inactive
- 9. - Alert system for missing children
- 10. - Elizabeth Short murder case nickname
- 11. - Famous unidentified serial killer
- 13. - Child beauty queen murder victim
- 16. - Triangular area of mysterious disappearances