What is a good advertising site when looking for a good litigation attorney but you can't afford them?

There is a homeless guy in my community. He is not a bum at all; he works as a custodian in a gas station but still can't afford a lawyer. He was a whistle blower, and his signature was forged on a piece of paper. He has evidence. Please help me to help him. I already have a listing on Craigslist.com. Thanks!