Michael Cook -- A former St. Clair County County Circuit judge who was charged with federal weapons and misdemeanor heroin possession charges. Arrested outside his dealer Sean McGilvery's Belleville home. Pleaded guilty and is awaiting sentencing.
Sean McGilvery -- A former legal client and longtime friend of Cook's. Told federal agents after his arrest that he sold heroin to Cook "almost daily." Pleaded guilty to federal distribution of heroin charges and is awaiting sentencing.
Joe Christ -- Longtime St. Clair County assistant state's attorney who was sworn in as an associate judge last year. He died of cocaine intoxication sometime on the weekend of March 9 and 10 at the Cook family hunting cabin in Pike County, Ill.
James Fogarty -- Former St. Clair County probation officer. Told FBI agents that he sold Christ and Cook cocaine in the days before Christ's death
"The plumber" -- Friend of Cook's who provided him with heroin. Cook had a key to the plumber's home and used heroin there four times a week, according to an FBI affidavit. He has not been charged. Served as an intermediary between Cook and McGilvery for a time.
Cooperating Individual No. 1 -- Federal agents describe this anonymous source as a "self-admitted former drug user," who has not been paid, has not been charged with a crime and is not currently under investigation. "CI1" told agents that Cook used cocaine "hundreds of times, abused prescription medication, and used crack cocaine. CI1 claimed Cook had been using drugs for the past 10 years.
Deborah Perkins -- Resident of 20 Kassing Drive in Fairview Heights. Claimed to be business partners with McGilvery in the heroin distribution business. She told federal agents that she and McGilvery made more than 20 trips to Chicago to buy heroin for resale in the metro-east. At the end of 2011, McGilvery gave Perkins between $2,500 and $5,000 every two weeks to purchase heroin.
Douglas Oliver -- Perkins' son who also lived at 20 Kassing Drive. Oliver traded sex for heroin with Jessica Williams and Jennifer Herling. Williams. 30, overdosed on March 3, 2012. Herling, 20, died on Sept. 29, 2012. Oliver was sentenced to 30 years in federal prison for conspiracy to distribute heroin. He and his mother were charged in state court with concealing William's death and have pleaded guilty.
Justin Cahill -- Facing federal charges for selling OxyContin, Cahill told federal agents that in exchange for providing OxyContin to Cook, he believed he would receive a shorter jail sentence. Cahill told agents that he supplied cocaine and OxyContin to Fogarty. Cahill is currently serving a nine year prison sentence on the federal charge.
Uncharged drug supplier -- Friend of Cahill. Took OxyContin from Cahill and delivered it to Cook. This witness told Cahill that he arranged for Cahill's fourth driving under the influence case to be assigned to Cook. Between May to October 2010, he went to Fogarty's house on "numerous" occasions to deliver drugs. While there, Cahill told agents he saw several white men at Fogarty's house and later heard the uncharged drug supplier describe them as "officials."