Has she been written up previous or any suspensions hanging out in her file? If not there is nothing management can do. Or maybe she knows someone in Union that can smooth things over.

What department or position does he or she hold in Kroger?

Do you know why she was fired?

Do you know what type of employee he or she is? 

Do you know how long he or she has been employed by Kroger?

Do you know what contract he or she was under?

Same questions for the manager.

What type of relationship do they have? 

Unless you have all this info its hard to comment on this post.