This follows CBI's move to launch an initial inquiry on Feb. 25 into the allegations following the Feb. 12 arrest in Italy of Mr. Orsi, Finmeccanica's then-chief executive, for bribery, and a subsequent request for a probe by the Indian government.

WSJ: India Registers Case in Finmeccanica Probe

His firing is under investigation by the Alaska Legislature, but Palin's attorneys filed papers this week to request Alaska's Personnel Board take over the probe.

CNN: Palin aides peeked into trooper's files, union says

But the police didn't accede to the family's request for the FBI to be given oversight over the probe.

WSJ: Singapore Probe Becomes Point of Dispute With U.S.