The Denver Post ran this three-part in depth series on informant use: How police reliance on confidential informants in Colorado carries risk, Some want harsher laws for confidential informants in Colorado, and Colorado gang slaying by ATF informant shows perils of informant use.
The series documents a large number of convictions obtained through informant use, including important evidence against violent gangs. It also reveals wrongful convictions, an ACLU lawsuit, tens of thousands of dollars paid to informants, and the continuing violent crimes committed by some informants while they were working for the federal government.