Thomas Riha
- Year
- 1969
- Where
- Boulder, Colorado
- Source
- Colorado Bureau of Investigation
- Evidence
- 1
Thomas Riha was a Czech born U.S. citizen who taught Russian history at CU Boulder in the 1960s.On the night of March 14, 1969, Riha went to a birthday party in Boulder, Colorado, where he told the ho
From the Colorado Bureau of Investigation cold case file. Records change. The source is the authority.
Got ten minutes? Do one of these.
What is the last confirmed sighting, and what is the documented timeline around it?
- Pin down the last confirmed sighting: who saw them, where, and when.
- Build the 48 hours before and after from what is on the record.
- Check for unidentified persons found in the region after that date.
New to this? Read the field guide. Five short lessons.
What is out there.
Podcast episodes
Also in the index
Nobody has researched this case yet. Have the AI search the web for reporting, podcasts and videos about it.
Search elsewhere
More in Colorado
Disappearances of Paul and Sarah Skiba and Lorenzo Chivers
Paul Carroll Skiba (born February 23, 1960), his daughter Sarah Arielle Skiba (born July 27, 1989), and Lorenzo DeShawn Chivers (born November 5, 1962), an employee of Skiba's moving business, disappeared under mysterious circumstances in Westminster, Colorado, United States, on February 7, 1999. On the day they went missing, Sarah accompanied her father Paul, who owned the Tuff Movers company in Westminster, on a…
1928 · ColoradoMissing
Disappearance of Glen and Bessie Hyde
Glen and Bessie Hyde were newlyweds who disappeared while attempting to run the rapids of the Colorado River through the Grand Canyon, Arizona, in 1928. Had the couple succeeded, Bessie Hyde would have been the first woman known to accomplish this feat. Despite lengthy investigation, no conclusive evidence of the Hydes' fate has been discovered.
2013 · San Luis, ColoradoMissingLouis Deherrera
Mr. DeHerrera was last seen on August 4, 2013. He has not been seen since. Anyone with information regarding this case is asked to please contact the Costilla County Sheriff's Office.