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

Mark Collman Missing Person Case

Last seen in Yorkville, Illinois on Apr 03, 1979

Victim Details

Created

Oct 06, 2011

Case Added

Nov 08, 2022

Firstname

Mark

Lastname

Collman

Current Age

Age At Disappearance

Height

70 inches

Height To

71 inches

Weight

140 lbs

Weight To

160 lbs

Ethnicity

White / Caucasian

Gender

Male

Last Seen

Apr 03, 1979

City

Yorkville

State

Illinois

County

Kendall County

Zip Code

60560

Agency ID

10881

Agency Name

Yorkville Police Department

Agency City

Yorkville

Agency State

Illinois

Agency County

Kendall County

Agency Zip Code

60560

Agency Contact

Patrick McMahon

Contact Job Title

Detective Sergeant

Agency Address

804 Game Farm Road, Illinois

Agency Phone

6305534340

Agency Jurisdiction

Local

Agency Type

Law Enforcement

Agency Website

www.yorkville.il.us

Agency Case #

90-4115

Primary Agency

Yorkville Police Department

Hair Color

Brown

Left Eye Color

Brown

Right Eye Color

Brown

Last Updated

07/11/2026

Area Last Seen:

Case Description

Any updates on this case? Let us know!

In the spring of 1979, the life of the Collman family from Yorkville, Illinois, was unalterably changed. Twenty-one-year-old Mark Allen Collman, a recent high school graduate, was living in his parents' basement and working the second shift at the local Model Box factory. Because of his work schedule, it wasn't unusual for his parents to go a day without seeing him. The family's sense of normalcy was shattered on April 3, 1979, when Mark’s boss called to report that he hadn' ...

MEMBER ACCESS

Continue reading the complete case summary

Unlock the full case narrative for Mark Collman, all available source links, additional videos, and member discussions.

Unlock Full Case Access — $3.97/month

Cancel anytime.
Already a member? Log in

Last Seen: Apr 03, 1979

Links to Additional Sources (9)

See any mistakes? Let us know!

Missing Person / NamUs #MP12546

Mark Allen Collman - The Charley Project

MEMBER ACCESS

Unlock 7 additional sources

View the complete collection of available reporting and reference links for this case.

View All Case Sources — $3.97/month

Cancel anytime.
Already a member? Log in

Mark Collman Missing Person Case

Last seen in Yorkville, Illinois on Apr 03, 1979

Victim Details

Case Description

Continue reading the complete case summary

Links to Additional Sources (9)

Unlock 7 additional sources

Latest News

Army veteran sets off fireworks, starts fire outside NYC federal building, FBI says

The Disappearance of David Uhl

"Master yachtsman" fugitive captured on boat after 21 years on the run

The Disappearance of Perry Matheson

Details on suspect in explosion outside federal building in New York City

Remains of Missing Sedona Woman Yolan Miller Identified

Suspect in custody after explosion in trash can outside NYC federal building

The Disappearance of Derrick Sylvester

Feeding Our Future fraud ring's alleged No. 2 appears in court after Somalia arrest

The Disappearance of Malik Polk

Forum Posts (1)

Join the discussion for Mark Collman

Other Missing Cases from Illinois