A Story of Unfairly Fired McDonalds Worker

My friend got fired unfairly at McDonalds recently because her boss received emails in which people talked good about her. She got fired because those emails were made up; however, she did not do it. When my friend went home, she found out that her co-worker was jealous of her and that girl is the one behind the scene. My friend contacted her boss about the girl that harmed my friend. When my friend said that she has technical evidence that show that girl is the one behind the scene, the manager did not listen. And he still keeps the devil.