Watch what you Google for.... (Tom Mighell):

If you're planning on committing murder, make sure you research your crime anonymously. In a murder trial going on in Raleigh-Durham, an inspection of the defendant's computer revealed that he had searched the words "neck," "snap," "break," and "hold" on a search engine before his wife died. The computer evidence also apparently indicates that the defendant allegedly researched lake levels, water currents, boat ramps, and access to the lake where his wife's body was later discovered.

When we talk about e-discovery, we're not just talking about e-mail and Word documents with embedded metadata -- we're also talking about your browser's search history. Properly harvested, it can definitely yield some interesting evidence.