Incredible 4 hours. The UI is very very convenient, given how tangled (that's a compliment!) the evidence is, I would not be able to put the story together without the timeline app and the mobile log app. Now that I think about it, I can't even think of anything I did not like about the game (except for AI usage, which I'm only finding now right now). No, wait. It would be great if mobile logs could be sorted by time and filtered not just by the receiver but also by the caller.