What you're going to want to do is hire local, not just some foreign bodybuilders you know.
And try something more creative and less troublesome than a lynching, there's a whole world of hate crimes, explore them.
Wait for it to warm up, you don't have to do it on the coldest night you can find in the dead middle of the night. A day with snow might even be more useful to lose any "evidence" in.
Eat your Subway first, before faking the hate crime. If you like it to marinate a little you can do that earlier too. Besides, if you get really creative you won't want to eat afterwards anyway. As a bonus you don't have to carry it around with you.