Cynthia Coon left her residence en route to school in Ann Arbor. She did not attend school at all that day and did not return home that evening. She made contact with her family twice, once on April 1, 1970 and again on April 2, 1970. She did not know her whereabouts at the time of the calls. An extortion-type call was received by the family on May 5, 1970. Since that time, no further contact has been made with the family. (Information retrieved from NamUs.gov)