A former U.S. Marine pilot fighting extradition from Australia on U.S. charges of training Chinese military pilots to land on aircraft carriers, unknowingly worked with a Chinese hacker, his lawyer said.

Daniel Duggan, 55, a naturalised Australian citizen, feared requests by Western intelligence agencies for sensitive information were putting his family at risk, the lawyer said in a legal filing seen by Reuters.

The lawyer’s filing supports Reuters reporting linking Duggan to convicted Chinese defence hacker Su Bin.

Duggan denies the allegations that he broke U.S. arms control laws. He has been in an Australian maximum security prison since his 2022 arrest after returning from six years working in Beijing.