Historical clue formulations

• Cop ___ — 2019-12-01
• Cop ___ (confess in return for lighter punishment) — 2018-05-07
• Cop ___ — 2005-05-22
• Cop ___ — 2003-04-20
• Cop ___ — 1999-04-01
• Cop ___ (confess for a lighter sentence) — 1997-03-11
• Cop ___ (negotiate for a lighter sentence) — 1996-12-23