Looks like Biden won't be arrested. The best that can happen is that everyone around him is.

"[Article II, section 1 of the Constitution . . . . ] The President does not enlist in, and he is not inducted or drafted into, the armed forces. Nor, is he subject to court-martial or other military discipline."

https://law.justia.com/constitution/us/article-2/11-the-president-as-commander-of-the-armed-forces.html