In which Hitman franchise you felt that enemies were overly suspicious of you?

For me, it was Hitman: Contracts. It's one of my favorite series from the game, but the enemies are almost always suspicious of you. It's certainly a better refinement to its predecessor Codename 47 in terms of alertmeter, as in Codename 47, if you decided to run just by yourself instead of walk, enemies would get alerted by even that. It's a frustration we've passed long ago, but the thing that brought me thorough discomfort was enemies "magical" ability to always find a dead body after awhile, even if you've killed only one of them and nobody saw you. Even if the body was put in a goddamn river or something..

I wanted to see if there's anyone thinks just alike. And if so, what are your biggest Hitman frustrations as well(?)

I mean if I saw a bald person in a dark suit stalking around, I be over suspcious as well lol.