What can I legally do if the CFO of my company stole $3,600 directly out of the business bank account to pay himself without proper authorization?

He has admitted guilt, saying what he did was completely wrong, and has since paid back the money he stole. He was also supposed to be a majority owner in the firm as well with 3 other executives. Originally, the 4 executives agreed to 25% ownership in the firm, but no Operating Agreement has ever been created nor signatures written. He is demanding that he still has 25% ownership and demands that he receives compensation. I want to fire him and possibly press charges. Any advice or suggestions? Thank you.