A homeless man whose selfless act of using his last $20 to fill up the gas tank of a stranded motorist in Philadelphia got him worldwide attention is suing the couple who led a $400,000 fundraising campaign to help him.

Johnny Bobbitt says he�s concerned that Mark D�Amico and Katie McClure have mismanaged a large part of the donations raised for him on GoFundMe . The New Jersey couple denies the claims, saying they�re wary of giving Bobbitt large sums because they feared he would buy drugs.

Bobbitt�s lawsuit contends the couple committed fraud by taking money from the fundraising campaign for themselves. He�s seeking undisclosed damages, and his lawyers want a judge to appoint someone to oversee the account.

A hearing on the lawsuit is scheduled for Thursday.

McClure set up the online fundraiser page as a way to give back to Bobbitt, who came to her aid when she ran out of gas on an Interstate 95 exit ramp late one night. It raised more than $400,000 in funds donated by more than 14,000 people.

Bobbitt walked a few blocks to buy McClure gas. She didn�t have money to repay him at the time, but sought him out days later to give him the money, and visited him a few more times to bring food and water. They later appeared on shows like �Good Morning America� and were interviewed by the BBC.

But the relationship has since gone sour.

Christopher C. Fallon, one of Bobbitt�s lawyers, told The Philadelphia Inquirer that the legal action was taken after D�Amico ignored multiple requests for a full accounting of the money raised by the GoFundMe campaign.

�He�s really left us with no choice but to go forward,� said Fallon, one of two pro bono lawyers from Cozen O�Connor in Philadelphia whom Bobbitt retained last week.

McClure and D�Amico have repeatedly denied any wrongdoing or misusing any of the money. D�Amico has said Bobbitt spent $25,000 in less than two weeks in December on drugs, in addition to paying overdue legal bills and sending money to his family.

The couple also bought Bobbitt a camper with some of the funds and parked it on land McClure�s family owns in Florence. But Bobbitt became homeless again after D�Amico told him in June that he had to leave the property.

During an appearance Monday on NBC�s �Megyn Kelly Today� show, D�Amico told Kelly there was well over $150,000 left of the donations.

(AP)