The Tulsa Police Department has made sweeping changes in policies governing confidential informants, requiring officers to document such agreements, gain approval of supervisors and terminate ...

FBI leaders have warned that hackers who breached AT&T’s system last year likely stole months of agents’ call and text logs, prompting an urgent effort to safeguard confidential informants’ identities ...

The Portland Police Bureau cast its use of confidential informants as part of a “measured response” that allows officers to focus on arresting lawbreakers rather than using force indiscriminately ...

The Globe Spotlight Team’s latest investigation examined widespread misconduct in how police across Massachusetts use — and exploit — confidential informants to fight the war on drugs. The multipart ...