In the options menu, you can specify whether or not you want feedback/help with the investigation sections. The main one you'd be interested in is the background music, which will turn off the "investigation music" in a scene when you've found all the clues.
There is also a chime that plays for each clue, and it changes depending on whether you're near an examined clue versus a clue you haven't. If you are playing on a console, there is an option to turn on or off controller vibration when you are near a clue.
Some people prefer to have these options on to assist them during investigations, but others prefer to have them off to increase the challenge and/or the realism.