209 Cases Solved. Advancing justice for missing persons, unsolved homicides, unidentified and unclaimed remains.

Thomas Riha
Missing

Case Description

Any updates on this case? Let us know!

Riha was last seen at a dinner party in Boulder, CO. His passport and other personal effects were later found in the home of a person of interest who committed suicide in 1971.
Last Seen: Mar 15, 1969

Links to Additional Sources (7)

See any mistakes? Let us know!

Missing Person / NamUs

The Disappearance of Professor Thomas Riha - Denver Public Library

...View 5 additional sources

Victim Details

created

Mar 08, 2016

Case Added

Jul 17, 2020

firstname

Thomas

lastname

Riha

Current Age

Age at Disappearance

Height

70 inches

Weight

140 lbs

ethnicity

White / Caucasian

gender

Male

Last Seen

Mar 15, 1969

City

Boulder

State

Colorado

County

Boulder County

vehicles

391

Agency ID

18097

Agency Name

Boulder Police Department

Agency City

Boulder

Agency State

Colorado

Agency County

Boulder County

Agency Zip Code

80301

Agency Contact

Andrew Kirshbaum

Contact Job Title

Detective

Agency Address

1805 33rd Street, Colorado

Agency Phone

3034413333

Agency Jurisdiction

Local

Agency Type

Law Enforcement

Agency Website

https://bouldercolorado.gov/police

Agency Case #

P69-7940

Agency Report Date

1969-04-04

Primary Agency

Boulder Police Department

Hair Color

Brown

Left Eye Color

Blue

Right Eye Color

Blue

Last Updated

12/12/2025

Area Last Seen:

Thomas Riha
Missing

Case Description

Links to Additional Sources (7)

Victim Details

Forum Posts (2)

Other Missing Cases from Boulder, Colorado

Thomas Riha Missing

Case Description

Links to Additional Sources (7)

Victim Details

Forum Posts (2)

Other Missing Cases from Boulder, Colorado

Thomas Riha
Missing