Book rec post! Because it occurs to me that I haven't done one in ages, and also a friend was recently asking me about serial killer books, which reminded me of book recommending in general. (After denying that I read many serial killer books, I examined my shelves and discovered that I actually read a shit-ton of them, which, slightly disturbing. To say nothing of the stacks of books on similar topics. I DON'T EVEN.)
So these are recs for books about forensic detection, and how to evade same. On the off-chance that that information might be useful to you one day.
( The Poisoner's Handbook )
( Murder 2: The Second Casebook of Forensic Detection )
( Beat the Reaper )