The Navy is poised to promote the admiral in charge of its elite SEAL teams and other commando units even though Pentagon investigators determined that he illegally retaliated against staff members who he mistakenly suspected were whistleblowers. Rear Adm. Brian L. Losey was investigated five times by the Defense Department's inspector general after subordinates complained that he had wrongly fired, demoted or punished them during a vengeful but fruitless hunt for the person who had anonymously reported him for a minor travel-policy infraction. After conducting separate, years-long investigations that involved more than 100 witnesses and 300,000 pages of e-mails, the inspector general upheld complaints from three of the five staff members. In each of those cases, it recommended that the Navy take action against Losey for violating whistleblower-protection laws, the documents show. The Navy, however, dismissed the findings this month and decided not to discipline Losey. He now leads the Naval Special Warfare Command. The previously undisclosed investigations into one of the Navy's top SEALs underscore the weakness of the military's whistleblower-protection law and how rarely violators are punished. Of the 1,196 whistleblowercases closed by the Defense Department during the 12 months ending March 31, only 3 percent were upheld by investigators. The complaints against Losey also illustrate the Pentagon's long-standing reluctance to discipline top brass for wrongdoing and how the military typically conceals misconduct investigations from public view.