Think back on all thise Agatha Christie novels I've read. Eveyrhthing a criminal needs to know is in THERE. And then make sure I hide everys ingle piece of evidence I have. Every single one. Fingerprints, weapons, blood trails, check alibi, ensure i have witnesses, make sure that the stime of death doesn't collide with where I am then, hide any motives...
Agatha Christie is a goodeess