I had helped a "friend" by making some car payments for him. I had always called the bank myself and authorized the payment. The last authorized time was to be in January. In march, I noticed on my online banking acct. that funds were deducted for the car payment. When i asked my "friend" about it, he replied he didnt know why or how that couldve happened. Then i contacted the bank who told me that he had approved for them to use my account info. that was on file and they did. Since confronting him yet again, he finally admitted to it.
What recourse, if any, do i have against him?

Thank you for your help and guidance.