A former FBI director has recommended that the Justice Department investigate whether several lawyers plotted to corrupt the settlement program designed to compensate victims of BP's 2010 Gulf oil spill.

But the independent probe led by Louis Freeh didn't find any evidence of wrongdoing by the multibillion-dollar settlement's court-appointed administrator, Patrick Juneau. He has been a target of BP's increasingly aggressive campaign to challenge payouts to Gulf Coast businesses.

Freeh was appointed by a federal judge to investigate alleged misconduct by a staff attorney who worked on the settlement program. Freeh concluded Friday that then-top members of Juneau's staff engaged in conduct that was improper, unethical and possibly criminal.

The report found nothing that warranted shutting down payments to victims of the oil spill.