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Case Description

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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't shown up for his ...Read More
Last Seen: Apr 03, 1979

Victim Details

Oct 06, 2011

Nov 08, 2022

Mark

Collman

67

21

70 inches

71 inches

140 lbs

160 lbs

White / Caucasian

Male

Apr 03, 1979

Yorkville

Illinois

Kendall County

60560

10881

Yorkville Police Department

Yorkville

Illinois

Kendall County

60560

Patrick McMahon

Detective Sergeant

804 Game Farm Road, Illinois

6305534340

Local

Law Enforcement

www.yorkville.il.us

90-4115

Yorkville Police Department

Brown

Brown

Brown

05/29/2026


Area Last Seen: