Being so close to the draft is the issue. Even if he's innocent it's gonna take time to sort through so even if he got drafted he'd probably drop to the lower rounds and lose out on a bunch of $. Let's say this takes a couple of months before it's settled so if he holds out until next year's draft and can enter it without this hanging over his head he probably makes a lot more.
All of this is hypothetical because we don't know all of the facts yet. I sure hope it's not true.