Firstly if you haven’t seen the episode of Jonathan Creek that premiered this New Year and intend to do so don’t read any further
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In the episode there was a trap set into a bath to kill anyone who used it by dropping them into a water tank, then bringing the bath up to leave no trace of them. it was done in 1938 and killed someone in 2008. I’m wondering if there are any good real life examples of traps set by people that kill someone else many years later and what the record is. (Any ancient Egyptian traps verifiably kill someone thousands of years later?)