A new private investigator is working on the case against Britney Spears' former pal and manager, Sam Lutfi, Life & Style can exclusively report.

Tri-Valley Investigations, based in Newhall, Calif., is trying to get a profile of Sam, who already must stay at least 250 yards from Britney under terms of a restraining order against him. "They want to talk to anyone who has met Sam or knows him," an insider tells Life & Style. "They want anything they can get to make him look shady."

"I am working on the Sam Lutfi case," the founder of Tri-Valley Investigations, Cookie Schwartz, confirmed to Life & Style.

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