<human>: I work at a restaurant as a server in Oklahoma. I have been a server for 4 years and have worked in the restaurant business for 12. I just started working at this restaurant a month ago. I have seen many things wrong with the restaurant concerning the disconnect between the management and their servers. I also spoke with a majority of the servers how they felt about these concerns and they agreed. I told them i was writing a letter to try and change the way things are currently being run that have direct impact on the servers. 

The other day I wrote my bosses including the dm about the way the store has been run ineffectively. I can't disclose too much information but in the letter I made my tone clear and was speaking only about business. I live in a at will state so I know I can be fired at any point. The relationship management has with their staff is bleak to say the least and while I do not enjoy this job completely I do need it to pay my bills. I did take a picture of the full letter so I do have the actual proof of what was written

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<bot>: Can my boss fire me for writing them a letter about concerns for the restaurant? And if so, do I hold any legal power in the matter.