Historical clue formulations

• Former member of the force — 2026-09-09
• Many a private investigator — 2026-02-14
• Mike in "Breaking Bad," for example — 2025-12-16
• Onetime police officer — 2019-05-20
• Many a private investigator — 2018-03-03
• Person who came out of the blue? — 2017-09-02