 The defense rested on March 4 , after five weeks of trial . Assistant United States Attorney Francis <unk> delivered the prosecution 's closing argument . Stewart and George Callaghan closed for Glasser and Kretske ; Hess for Kaplan ; Cassius Poust for Roth ; Ward concluded the government 's argument . Stewart 's closing focused on the credibility of the prosecution 's witnesses , many of whom had been transported from prison to testify . Stewart urged the jury not to take the word of " crooks and convicts . " 
