Authorities on Thursday, Sept. 24, 2009, arrested Michael C. Finton, 29, of Decatur for his role in an alleged plot to blow up the federal courthouse in Springfield, Ill. Undercover agents were in on the plot and arranged for Finton to park a van containing fake explosives in front of the courthouse on Wednesday, Sept. 23, before arresting him. Below is a timeline of the case derived from the federal complaint against Finton.