Prosecutors' Discretionary Use of the Grand Jury to Initiate or to Reinitiate Prosecution

This study examines the exercise of prosecutorial discretion in two areas: the decision to initiate prosecution by indictment (in lieu of a preliminary hearing) and the decision to reinitiate prosecution by indictment after preliminary hearing discharge. To explore concerns about prosecutors' use of the grand jury to pursue prosecution in cases with insufficient evidence to convict at trial, the author studied prosecutors' practices in murder cases in Cook County, Illinois. To gather the information the author collected disposition data for prosecutions initiated by grand jury and by preliminary hearing, interviewed prosecutors, and examined prosecutors' case documents indicating reasons for declining or pursuing prosecution of discharged cases. The data show similar conviction rates for prosecutions initiated by grand jury and those by preliminary hearing but a significantly lower rate for prosecutions reinitiated after discharge. Three reasons for the latter finding are discussed: special evidentiary characteristics of reinitiated cases, seriousness of the offense studied, and prosecutors' special motivations and practices in serious cases. The author suggests that although prosecutors typically are constrained by practical, organizational, professional, and ethical concerns, they may in extraordinary situations reinitiate prosecution of weak cases. In light of the study's findings, the author assesses several proposals to eliminate or restrain prosecutors' power to reinitiate.