What investigative technique involves delivering contraband to a suspect?

The technique known as a controlled delivery involves law enforcement intentionally delivering contraband to a suspect in order to observe their reaction and gather evidence of illegal activity. This method is carefully orchestrated to maintain oversight and ensure that the delivery is monitored, which allows investigators to document the suspect’s actions and intentions regarding the contraband. Controlled deliveries can lead to the development of further intelligence or even the arrest of individuals involved in the trafficking or distribution of illegal goods.

In contrast, other approaches like undercover operations involve law enforcement personnel infiltrating criminal organizations to gather evidence without the use of contraband delivery. A search warrant is a legal document that permits law enforcement to search a specific location for evidence of criminal activity, and the term 'pass through' does not specifically relate to any established investigative technique related to contraband delivery. Controlled delivery is unique in its direct engagement with the suspect using the contraband, making it a vital tool in various investigations.