When it comes to doing investigations using online tools, there is no one tool that will answer all of your questions. Instead you’ll most likely need to build slowly towards the answer using a jumble of jigsaw pieces -- a name here, a connection there. The good news is that there are dozens of tools that can be used to find the pieces to your puzzle. GIJN's Alastair Otter has pulled together tools that can be used to help build a profile of someone -- or their business.
