With complete freedom to move around the fictional town, you can:
Move around the map at any time
8 different areas to explore
Super realistic street scenes, almost exactly the same as your doorstep
Anytime and anywhere to start an investigation
... It's said, but not everywhere will have the results
Talk to anyone you see
Collecting testimonies in order to catch the killer is of course inevitable
The dialogue of the npc is completely random, except for the inexplicable random thoughts You can also see conversations that are specific to different times and places
Show items to anyone you see
It's true that you can show it to anyone
but don't forget that these things were gotten from the crime scene