Eh. It’s rumor and hearsay. It should be noted as such (the part about McCain being transferred while there will still fires burning on the ship).
Believe what you wish.
You don’t think McCain and his cronies didn’t do their best to whitewash his background?
And what officer would leave a paper trail against an Admirals son that could scuttle his own career? Especially a prick like McCain who was more than happy to use his dad’s good name and reputation against anyone?