Prosecutors and Police officers routinely use confidential informants to gather information and perform controlled buys in narcotics cases, firearms cases or cases involving other contraband. Often, police will use what a confidential informant tells them to establish probable cause when they seek to obtain a search warrant. Thus, confidential informants can play a significant role in many New York drug cases.
However, police and prosecutors generally refuse to a provide the defense with the identity of the confidential informant because once an informant’s identification is known, they can no longer be used by police and may face retaliation. At the same time, if a defendant cannot question police about the existence of the informant, there is the concern that the informant may not exist and that police fabricated the informant to get around the warrant requirement.
To alleviate these concerns, courts require that the prosecution present the confidential informant in an ex parte hearing (outside the presence of the defendant). Recently, a New York appellate court issued an opinion in a case discussing the proper procedure a court should follow when presented with a case in which the prosecution is relying on a confidential informant’s testimony to develop probable cause.