ScanProof Trophy/Achievement Guide for Watch Dogs on Playstation 4 (PS4)
Be prepared with jam comms.
First find an open area with a motor boat nearby.
Then start killing nearby pedestrians, if they try to call the police, shoot them.
Do this until you have five stars.
Then find a boat and escape before getting detected by police.
If police start chasing you, then you can't get the Trophy/Achievement, so escape using jam comms.