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Case Description
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Mark Allen Collman, a 21-year-old from Yorkville, Illinois, was last seen on April 3, 1979. On the day of his disappearance, his parents were alerted when his employer called to report that Mark had not shown up for his second-shift job at a local Model Box factory. He lived with his parents in their basement, and his sudden absence without any communication was unusual, especially since he was close to his younger siblings.

Despite extensive searches and inquiries, no trace of Mark has ...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

282

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

11/24/2025


Area Last Seen: