The Michigan Murders was a series of highly publicized killings of young women committed between 1967 and 1969 in the Ann Arbor/Ypsilanti area of Southeastern Michigan by an individual known as the Ypsilanti Ripper, the Michigan Murderer, and the Co-Ed Killer. Although never tried for the remaining five murders attributed to the Michigan Murderer, or the murder of a sixth girl killed in California whose death has been linked to the series, investigators believe Collins to be responsible for all seven murders linked to the same perpetrator.