The defense attorney for a serial killer has shared crucial details on a case that shook the nation nearly four decades ago. John Wayne Gacy from Illinois earned the moniker of “Killer Clown” after committing horrifying atrocities on young boys for years, Fox reported. Karen Conti was part of the defense team that fought on his behalf during death row appeals. She researched the case and had meetings with Gacy himself, before sharing her observations. Gacy was convicted of murdering 33 young men and boys, in and around the Chicago area, the FBI reported. He reportedly buried most of his victim…