The Doe Network Missing Person, circa 1979 Mark Allen Collman Case Classification: Endangered Missing Missing Since: April 03, 1979 Location Last Seen: Yorkville, Kendall County, Illinois Physical Description ** Listed information is from the time of disappearance. Date of Birth: N/A Age at Time of Disappearance: 21 yrs old Race: White Gender: Male Height at Time of Disappearance: 5'8"-5'9" Weight at Time of Disappearance: 140-160 lbs Hair Color: Brown Eye Color: Brown Alias(s) / Nickname(s): N/A Distinguishing Marks/Features: Small scar on the side of his nose (unknown which side) Dentals: Available Fingerprints: Not Available DNA: Not Available Clothing & Personal Items Clothing: Unknown Jewelry: Unknown Additional Personal Items: Unknown Circumstances of Disappearance Mr. Collman was an adult at the time he went missing. His mother called from out of state when she had not heard from Mr. Collman for two weeks. Investigating Agency(s) If you have any information about this case please contact; Agency Name: Yorkville Police Department Agency Contact Person: Detective Stacey Mott Agency Phone Number: 630-553-4340 Agency Case Number: 90-4115 NamUs Case Number: MP#12546 Please refer to this number when contacting any agency with information regarding this case. Information Source(s) NamUs Return to the Unexplained Disappearances' Index Questions or comments? Please contact appropriate member of the Area Team Last Updated: 06.12.2012 - By: BR/Web Asst Copyright © 1999 - 2010 by The Doe Network All photos and information contained within this Web site are the properties of the listed information sources within the case files.