Circumstances of Disappearance
Michael Mansfield, a Lincoln College student, was last seen on December 31, 1975. Around 14.00 on New Year's Eve 1975, he received a phone call, put on his coat and walked out the door, telling his parents he was visiting a friend in nearby Arlington Heights.
This was six days before he was to testify against Russell Smrekar, a former Lincoln College student, who was convicted of murdering Robin and Jay Fry and is serving 200 to 600 years at Stateville Correctional Center in Joliet. Jay Fry was a clerk who saw Smrekar steal two steaks from a local grocery store, and he was prepared to testify at Smrekar’s shoplifting trial. Smrekar is also believed to be responsible for the disappearance of Ruth Martin who was to be a minor witness in the trial. Both Martin and Mansfield are presumed to have been killed by Smrekar, although their bodies were never found.
In 2004, a book titled "Process Of Elimination: A Midwestern Murder Mystery" was released by author Bonnie J. Thompson. In it, she writes about the unsolved disappearances of Mansfield and Martin.

Investigators
If you have any information concerning this case, please contact:

Lincoln Police Department

Source Information:
Process of Elimination
Daily Herald