Am I wrongfully terminated to cover someone else higher in my chain from being fired?

At a Healthcare facility, during a state compliance audit, my kitchen area was identified as a complaint and told that I was under investigation I was asked for a copy of my menu and the cart delivery times. they arrived on Tuesday afternoon, they inspected all day Wed and Thur. On Thursday afternoon, I (Director, of Dining Services) was called into an office and told that until the investigation was over; I was terminated: I was told to get my belongings, turn in my key and leave. Not to contact my staff that they would do so.