He also sold export-controlled Technology to persons in China.
He was offered $300,000 a year by two operatives of China’s powerful Ministry of State Security for “consulting services.”
...meeting the operatives in private rooms in Beijing hotels and teahouses, and said they paid him to attend events on forensics, information security and military communications. They paid him, he said, by buying computer forensic products from him at inflated rates.
“sold technology....” Thus the reason for the Department of Commerce being involved.