Cool game! I especially liked the innovative investigation mechanics which made me feel like I was a detective.
I was unclear from the story whether I was Sam Carter or his rookie partner? Maybe I just didn't pay enough attention. Also I was expecting more red herrings and not to have it be such a cut and dry case. Still, it was a good level of challenge to figure out which clues to combine and what investigative techniques to use on which clues.
The time factor I found somewhat annoying to constantly pause the clock and make sure it wasn't running. It did make me feel pressure to solve things quickly which adds realism.
Overall I think this is a really good start! The writing, the art, the overall story definitely provide a strong noir atmosphere, and it provided a good level of challenge to keep me engaged.