There are enough Lawyers out there for any FedEx employee or victim to get the help they need. Search Justia.com for cases involving FedEx in you local federal district court and see who the lawyers are. Ask around, seek referrals, look for someone with FedEx experience. Find one, but first keep good notes, save every piece of paper, never sign anything, take photos, keep a daily diary with events and witnesses, make recordings, keep every shred of information you can, keep good relationships at work because FedEx will try to use all of your co-workers against you, dig deep into the personal lives of managers, expose their weaknesses (FedEx will certainly do this to you).
FedEx has deep legal pockets but they run their lawyers ragged. Imagine the workload that FedEx wants from the couriers and translate it to their legal team. I do not understand how any amount of money could be be worth the lives they keep, working for a company that will one day possibly throw them under the bus.
Always remember, even though it is very had for some to understand, you mean nothing to FedEx. You are a unit of human capital, you are at will, you are the enemy of FedEx and they will be nice to you when they need something and then show you the door.