The second part of the Paper Trail mission line for inFAMOUS: Second Son has just been made available in the game. All you have to do to access it, provided that you completed the first part, is running to the southern end of the bridge connecting the two parts of Seattle (you can see the location in the pictures below), and start the mission.
Given the position of the starting location, you’ll be able to play the new mission only if you unlocked the second island through the game’s story. I won’t spoil the plot, but it adds a nice chunk of gameplay and it’s definitely a lot of fun.
If you’re unfamiliar with the Paper Trail, you have to register here, as the missions will require you to jump back and forth between the game and your browser in order to find clues and solve a mysterious string of murder cases in pursuit of an even more mysterious paper conduit.
At the bottom of the post you can also check out the video walkthroughs of the mission, courtesy of RajmanGaming HD. Watch them at your own risk, as they include spoilers.