The first murder victim in Shadows of Doubt turns out to be a gutshot corpse sprawled in their living room. Not much to go on at first glance, but a dropped wallet in the kitchen tells me the dead man's identity, and a note about work rotas left in their bedroom tells me they're a diner chef, a lead I can follow up on later. A shell casing has rolled under the sofa, and I manage to pull a fingerprint off it. That's a good clue – I don't have a match for it yet, but I can compare it to the various suspects I uncover along the way. I pin all of these factoids to the wonderful little corkboard in the UI, loving how I've uncovered all these leads myself without any prompting, while probably missing out on countless others.
From that point on, my choices are practically endless. I could bribe the building's security to let me look at the surveillance camera footage from the hall (or just break into the CCTV room if they're not amenable), interrogate the neighbours about what they heard at the time of the murder, ask questions at the victim's workplace, use an address book to find the home of their closest friend, or hack their computer to look at their email correspondence - and that's just getting started.
