This game is extremely confusing but the trophy isn't that hard to get.
When starting select day 3 at the menu screen. When the game properly begins, start driving north and take the 2nd left turn. If you went the right way you should see a train track with a train going by. Just north of that is Freddy in a hippie van. It won't pull over with your sirens so you need to bash into it until it drives off the road. Upon successfully doing that you need to get back to the station. Head north and keep taking the left turns (not the 90 degree left turns) and you should come across the police station. Simply drive into the parking spot and it will go to a new screen where you need to mash X extremely quickly to interrogate Freddy. If the bar filled up in time the trophy is yours.
If you are struggling to find the police station or Freddy then have some test runs to familiarise yourself with the map.
You don't need gas or donut refills but if you find you're running out of time then grab some donuts. They're the trays that go flying out on the side of the road, just drive past into the tray to get more time.
Never take any sharp 90 degree turns as that will lead you away from Freddy and the police station.
Drive with your sirens on so cars get out of your way.