Log on http://infamouspapertrail.com/ again and go to the profile view. Examine the traces acquired during the second mission. Crime Scene Photos will not lead you to any revolutionary discoveries. Using Killian's Phone will allow you to read messages from Skeeter. Finally, proceed to careful examination of the Tracker Drone. Click on the drone's icon to open the access window.
Access to the tracker drone box can be obtained in two ways. The first method involves finding the correct combination (it is always randomly chosen by the game). Start by entering any string of digits, such as 123456, so to get a response from the drone computer. An X indicates that the digit does not appear in the combination at all. The yellow color indicates that the digit appears in the combination, but in a different place. Green indicates that the digit is in the correct place in the string. In your each attempt you should leave the correct numbers (green) in the same place, and experiment with the others, keeping in mind that the digits marked in yellow fit in another slot. After several trials, you should determine the correct code.
The second method involves a clever trick on the inFamous: Paper Trail website performed by opening its source code. Click the right mouse button on the site and select page source option. Locate the line 106, where var currpd = phrase is, as it is here where password to the drone computer is stored (as depicted above).
Once you open the drone, click on the cash stored inside so to find a letter. Reading the letter will end the current part of the investigation. You can now launch the game again and take care of the third mission.