One of the most fascinating documents we came across was the BPD's subpoena of Philip Markoff's Facebook information. It's interesting for a number of reasons -- for one thing, Facebook has been pretty tight-lipped about the subpoena process, even refusing to acknowledge how many subpoenas they've served. Social-networking data is a contested part of a complicated legal ecosystem -- in some cases, courts have found that such data is protected by the Stored Communications Act.
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