[ Law & Ethics ] Open question: My job suspended me without being notified of any problems or why.

I work at Zaxbys and have never had problems before. Never had written this work. Never signed any paper ever spoken to be in trouble. I am also working on another job. My question is: can they suspend me without notice or even tell me why? They have just released the program and I am away all week when they know that I am available. What should I do? They have my coordinates. .