Historical clue formulations

• Have no co-conspirators — 2024-02-01
• Not have an accomplice — 2019-07-13
• Not have an accomplice — 2018-04-11
• Have no accomplice — 2017-02-11
• Have no help — 2013-12-27
• Have no accomplices — 2008-08-31
• Not have an accomplice — 2008-04-17
• Have no accomplices — 2005-03-27
• Have no accomplices — 2002-12-07
• Eschew assistance — 2001-03-17