Witnessing is an enforcer only action. While in the Action Districts criminals all over are committing crimes. What kind of a cop would you be if you could not witness the crime and engage pursuit of the criminals?
To witness a crime: firstly you must be an enforcer, and second you must find a criminal that has committed a crime. A pair of handcuffs will appear next to the right of their name if they have broken the law. Ram-raiding is currently the only crime that can be "witnessed."
Once you see a criminal commit a crime you must point yourself at him and press Alt when the orange circle appears in your recticle.
This will generate a bounty mission for the enforcer faction against that criminal or the group that he is in as long as the following conditions are met:
- The criminal or his team is not considering another mission
- The criminal or his team is not on another mission
It is feasible that if you witness a crime and are not currently engaged in a mission yourself, you may be offered the very bounty that is generated. Generally, the instantaneous nature of the bounty mission offer when you perform your witnessing will tell you that you are being offered to engage that criminal.
Witnessing a player gives you petty cash and standing. (approximately $6APB and 1 organizational standing)