That's one reason I love Hitman. That and dropping pianos on people's heads, throwing them Royal Rumble style over railings, sniping them from across the map, and even getting them killed by their own security.
Heck, in one level, you can mass-murder nearly an entire hotel full of people and make them all look like accidents.
I have to say, the opera house level in Blood Money is my favourite. Replacing the fake pistol with a real one so that someone else can unknowingly shoot your target for you? Simply sublime. Granted, immediately dropping a chandelier on the next target and a few more people who just happened to be in the way is just a tad suspicious and an all around uncouth way to follow up the first hit, but still.
Aah, but you may very well still be the new guy, and the new guy is the first to be blamed whenever something goes awry. If they don't know anyone was there, but things have just plain screwed up, who can they blame? Ghosts? Jesus?
That, and Garrett is a MAN. An awesome man.
Maybe it was an inside job? Maybe it was someone going for the hidey-sneaky approach to stealth? Then again, you may well suspect the new guy who appears for a few minutes, then vanishes immediately after something explodes and the guy he replaced is found unconscious, naked and stuffed in a dumpster, but fat load of good that'll do when he's long gone and you've nothing to go on but a few fleeting glances if his incredibly unremarkable face.
Besides, blood Money is way ahead of you on that one. After each level, you get a newspaper article of this hit you just did. If people did indeed recognise you, then it'll say so, and there'll be police sketches of you included, at increasing levels of detail and accuracy the more people see you for who you are. Then of course, security will be a lot tighter on later maps and people will have a much easier time seeing through your disguises.
IM AMERICAN STOP CORRECTING ME
Seriously I told you guys to stop.
Dude, seriously. It is genuinely difficult to figure out what you're actually saying. It's just a few extra key strokes on your part, it's not that difficult. It hardly warrants a full on melt down.