In Part II of its examination of the nearly 40-year-old Oakland County Child Killer case, the Free Press tells the the story of how Christopher Busch became an on-again, off-again -- and perhaps the most likely -- suspect in the investigation.

The case against Busch is laid out in hundreds of pages of investigative reports compiled by the Oakland County Child Killer Task Force and reviewed by Free Press reporter David Ashenfelter.

Interestingly, the documents were obtained by Barry King, the father of the child killer's last victim, 11-year-old Timothy King. Barry King has said he believes Busch was the killer, possibly with the help of others.

Read more: Detroit Free Press