Most Scouters I know do not have a personal attorney, nor can they afford one. As for the CO, most I have encountered are not active. And if they are active, councils tend to give them very little info on the situation in my experience. Heck when I was a DE, the SE kept info from me, and when I called him to tell him something about a situation, was told , " Oh yeah, I forgot to tell you....."
And another organization's investigation won't mean squat to BSA. I knew someone falsely accused of sexual assault. There was a criminal investigation, and the evidence they found supported my friend. Even though she was cleared, she was still banned by the BSA.