Crime Witness mod is a mod for GTA 5. With this mod your crime will only be alerted to Police if there was a police nearby or a passerby around you that saw what had happened.
Only passerby pedestrian that is walking can be count as witness. The witness will call police and only then your wanted level appear.
You can also kill cops from far away without being detected with this mod.
Using a suppressor will help from getting a wanted level.
This is a great mod to add realistic gameplay on GTA 5.