Doesn't matter. If they were fired for cause (even in a right-to-work state like MI) it's almost a given they cannot draw UEI.
Stupid, stupid move on their parts. You would think in a state with 15 percent unemployment they wouldn't be doing shit like this and risking their jobs.
ETA: And Vesta, if workers violate FFD rules or other alcohol/drug use policies, the union will pretty much step out of the way. Even the UAW isn't THAT stupid.