Debit getting higher and higher

Hello guys  My brother opened a resturant (owen business) at the begining it was alright and it was going ok and then started going down then he borrowed money from back to save the business but didn't work and he asked me money, i gave him $20,000 he survived for a while then he couldn't continue so  he had to close the resturant and now he has $90,000 debit to the bank, he can't keep up with the debit and interest it is going higher and higher he is looking for a job at the moment he is unemployed, i am helping him with $150 per week but it is not enough to suport his family and his little daughter and his wife so i need your guys hand to help us to get out of this nightmare please...and thanks in advance ...