And bear in mind, if this pans out, no deadline matters. Apparently according to Mississippi law, if vote buying is proven, its recipient is no longer eligible for office. Thad would lose his seat by default and a special election would be held.
But ideally, we want this seen by a judge now, the result invalidated, Cochran disqualified, and McDaniel declared the winner.
You forgot LIFE in prison for those involved.