Much has been made of the WM3, the trials, the aftermath, etc... so much so in fact that other child murders have been forgotten.

36 years ago, 4 kids between the ages of 10 and 12 were kidnapped and murdered in Michigan in what has become known as the the Oakland County Child Killer Case.... which to this day remains unsolved.

However, DNA technology unavailible 36 yrs ago may crack this cold case wide open. 

http://www.cnn.com/2012/07/17/justice/michigan-dna-cold-case/index.html?hpt=ju_c2