I contacted a Senator in 2010 to help me get a compassionate reassignment processed that my chain of command sat on. The compassionate was approved, but my chain of command did retaliate by directing a downgraded evaluation before I left. I filed a DOD IG complaint about a reprisal for protected communication under the military whistleblower protection act. The investigation took 2 1/2 years to complete and I was selected for involuntary separation through the QSP program. After reading the findings, which were found to be unsubstantiated, they failed to interview at least five of the witnesses I gave them. Instead they relied on the testimony of my rating chain only. My rater supplied me with a memorandum stating that he did not write my report. What recourse can I take?