What should I do if my supervisor lies to me and singles me out at work?

This past Friday everyone in my crew worked through lunch and went home an hour early. When I got back to my shop all their personnel vehicles were gone. I talked to my supervisor this and he said they didn’t. They were digging a hole somewhere. If that’s the case why were their work vehicles at the shop.

What should I do if my supervisor lies to me and singles me out at work?
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