Should he claim bankruptcy so that interest charges will be waived from him?

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Check below answers in case you are looking for other related questions:
Delaying repayment of a bank loan so that they will waive the interest
It is permissible to waive part of a debt in return for bringing forward repayment.

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Related Answers:
Ruling on taking an interest-based loan for an urgent need
Cashing cheques through a financial services company in return for commission
The bank is offering to let him delay payment of a loan in return for some fees
Delaying repayment of a bank loan so that they will waive the interest
It is permissible to waive part of a debt in return for bringing forward repayment.

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