Some digging revealed that Mr. Wolf was, until a few months ago, a law clerk on the Democratic side of the Senate Permanent Subcommittee on Investigations. He's found new work. The ID written out at the top of his faxes identified them as coming from "Glenn Simpson." That's the name of a former Wall Street Journal reporter who in 2009 founded a D.C. company that performs private investigative work.
The website for that company, Fusion GPS, describes itself as providing "strategic intelligence," with expertise in areas like "politics." That's a polite way of saying "opposition research."
When I called Fusion's main number and asked to speak to Michael Wolf, a man said Mr. Wolf wasn't in the office that day but he'd be in this coming Monday. When I reached Mr. Wolf on his private cell, he confirmed he had until recently worked at the Senate.
When I asked what his interest was in Mr. VanderSloot's divorce records, he hesitated, then said he didn't want to talk about that. When I asked what his relationship was with Fusion, he hesitated again and said he had "no comment." "It's a legal thing," he added.