Was a pretty fun game, very unpolished, but has good bone work. One thing I could suggest is to only have one button to interact or pick things up, the multiple buttons to pick things up didn't really make sense.
Other than that, the story could be done a bit better, for examples; if the character was unassigned from the case, she shouldn't have access to the case files and continue to investigate.
Also the criminal that is killed would normally not have a whole investigation board? He would be on the run and most criminals would not have the time to make a whole investigation thing.
Other than those things, optimising the game would be good as stuff in the second part was glitchy and didn't work really well.
But the boneworks of the game is there and could be pretty good if developed further, hope things go well as you work on the game!