It’s rare to get this much data about informant practices. The New Jersey ACLU has released this important study of confidential informant practices across the state, based on scores of documents, cases, interviews, and government policies. According to the study,
The use of informants in drug law enforcement in New Jersey was found to be largely informal, undocumented, and unsupervised, and therefore vulnerable to error and corruption.
Among many findings, the study determined that informant use led to the following problems: manufactured criminal conduct, financial abuse, police coersion, harm to the informants, unreliability, misuse of juveniles, using “big fish” to catch “little fish,” and the widespread violation of laws and guidelines. The study proposes reforms, and apparently a number of New Jersey counties have already responded with improved policies.