By Gregory O’Connell and Peter Sluka (July 20, 2017, 12:28 PM EDT) -- As international markets and services continue to grow in both breadth and complexity, suspected misconduct often transcends jurisdictional boundaries, and individuals increasingly find themselves amid investigations conducted by multiple nations and regulators. In these cases, subjects and targets considering speaking with investigators must be keenly aware of myriad complexities arising from varying interests of the involved nations, differences in substantive laws, jurisdictional limitations, mutual legal assistance treaties, and extradition policies. In the recent decision, United States v. Allen, the Second Circuit reversed the convictions of U.K.-based traders charged with manipulating the London Interbank Offered Rate and cemented a new protection for potential defendants: Testimony compelled by a foreign government may not later be used against the defendant in a U.S. criminal case.[1] The case brings to the forefront an issue that merits close attention from prosecutors and defense counsel throughout any multijurisdictional investigation....