She can try to sue for the amount plus court costs in her local small claims court. She'll need to establish that the money she withdrew was actually given to him, and that he agreed to pay it back. It's not going to help her case that the agreement was only verbal, AND that there was no set time frame for repayment. "When I can" could mean anything from tomorrow to ten years from now.

NEVER NEVER NEVER loan money to ANYONE without something IN WRITING!!!!!!