Historical clue formulations

• Investigators: Abbr. — 2023-12-03
• Investigators: Abbr. — 2008-07-06
• Police dept. figs. — 2007-12-05
• Some "CSI" figs. — 2007-10-28
• Priv. eyes — 2000-05-28
• "N.Y.P.D. Blue" offs. — 1996-02-04