DePeiza: SJC Affirms Terry Stop Based On Police Training And Experience

Many criminal prosecutions arise from evidence recovered by police during unplanned street encounters with citizens. Such "threshold inquiries" or Terry stops are standard investigative techniques employed by law enforcement after the Supreme Court's decision in Terry v. Ohio, 392 U.S. 1 (1968). The success of motions to suppress evidence recovered from such encounters depends upon the details of the encounter — what did the defendant do or say that aroused suspicion, what did the police say to the defendant, how did they say it, how reasonable were their actions — and the experience and credibility of the police officers. In Commonwealth v. DePeiza, 449 Mass. 367 (2007)("DePeiza"), the SJC, while providing guidance on the reasonable suspicion required to conduct a threshold inquiry, revealed an inclination to credit the training and experience of the police in their on-the-street assessment of a