Historical clue formulations

• Be a rat — 2026-08-27
• Tattle — 2025-07-06
• Sing — 2012-11-10
• Sing in court — 2012-09-07
• Sing, in a way — 2005-11-04
• Cooperate with the feds, say — 2003-08-17
• Sing — 2001-12-29
• Get specific — 1999-12-26
• Be a rat — 1996-02-23