Part of me wants to argue if this is even newsworthy. "Person arrested for arson was identified through investigation of publicly available information" is not a novel headline, but the moment you mention that the information was online is the moment Jo Public thinks the police hacked the internet. People in this thread have already mentioned Open Source INTelligence, or OSINT, so I don't think I need to say that Google search is not the same as cracking accounts.