For those who are still hunting the pumpkins, I forgot to bring up this useful resource. Click here.
APB player XtremeLaw has mapped out both Financial and Waterfront districts. The city blocks and streets names are labeled to help you navigate through the clues given by the game. Unfortunately, this won’t show the EXACT locations so this relies heavily on your ability to listen to the sound cues.
By the way, if the sounds cue sound like they’re at their maximum values, try looking in corner walls, or even looking straight up. Personally, I’m not a big fan of these type of events. It’s far too tedious and not very engaging. But regardless, happy hunting and happy Halloween!