[Angus]

I would pretend and tell him that some bombs had been planted in his home and then lock him and his family in the house, chained to the radiators, with an armed guard all round the perimeter.

Or

If his wife is innocent she should be prepared to cooperate with saving lives. She could pretend to be tortured on film which is played back to the bomber. If he's not prepared to save her life, then they should torture the hell out of him.