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

Thaddeus Claassen
Missing

Case Description

Any updates on this case? Let us know!

Thaddeus Claassen, a 30-year-old man, was last seen on December 10, 2023, in Burlingame, California. He is described as a white male, approximately 5 feet 10 inches tall and weighing around 150 pounds. Thaddeus has blonde hair and blue eyes.

On the day of his disappearance, Thaddeus was reported to have been in the area but did not return home, prompting concern from family and friends. His case was subsequently reported to the authorities, who initiated an investigation to locate him. ...Read More
Last Seen: Dec 10, 2023

Links to Additional Sources (2)

See any mistakes? Let us know!

Thaddeus Bennett Claassen - California Department of Justice

Missing Person / NamUs #MP120258

Victim Details

created

Apr 17, 2024

Case Added

Jun 14, 2024

firstname

Thaddeus

lastname

Claassen

Current Age

Age at Disappearance

Height

70 inches

Weight

150 lbs

ethnicity

White / Caucasian

gender

Male

Last Seen

Dec 10, 2023

City

Burlingame

State

California

County

San Mateo County

Tribal Land

vehicles

519

Agency ID

142001

Agency Name

Burlingame Police Department

Agency City

Burlingame

Agency State

California

Agency County

San Mateo County

Agency Zip Code

94010

Agency Contact

Mike Bolanos

Contact Job Title

Detective Sergeant

Agency Address

1111 Trousdale Drive, California

Agency Phone

6507774100

Agency Jurisdiction

Local

Agency Type

Law Enforcement

Agency Website

https://www.burlingame.org/departments/police_department/index.php

Agency Case #

2303215

Primary Agency

Burlingame Police Department

caseContributors

Hair Color

Blond/Strawberry

Left Eye Color

Blue

Right Eye Color

Blue

Last Updated

12/13/2025

Area Last Seen:

Forum Posts (3)

Has anyone heard any updates on Thaddeus Claassen's case? I'm curious if there's been any progress w... ...Read More
09/28/2024

Hey everyone, just wanted to throw something out there regarding Thaddeus Claassen's case. Has anyon... ...Read More
07/20/2024

Has anyone else heard about the odd pattern of disappearances in Burlingame recently? Thaddeus Claas... ...Read More
02/26/2024

Other Missing Cases from Burlingame, California

John McMeel