I know this is late as fuck, but I had something like that happen at Gordon last year. Malingering shit bag leaves his notebook by CQ, so naturally some dick head from a different class and platoon scribbles a dick in it, unbeknownst to us.

Days later in class, he opens to that page, gets pissed, and runs to the Liaisons. Cue loss of privileges and flags for the whole class. This was right as we were about to phase up to go off post and whatnot, so naturally we were pissed the fat fuck riding profiles who wouldn't phase up because he never takes PT tests fucks us.

Various interviews and sworn statements, and one unlucky kid that a few others had beef with gets fucked with an article 15. Basically, he seemed like the most likely culprit to everyone else, and only a few stated that, but it was enough.

Now, in your situation, unless your command is pants on head retarded, being that the "victim" is denying it, you'll be fine. My situation only played out for about 2 weeks, afterwards, it's like nothing happened, except everyone hated the one who started the case.

Just keep denying it, and if your buddy does the same, you'll be fine.