[10] A resulting probe revealed that Tuntex Corporation president Chen Yu-hao [zh] donated NT$100 million to James Soong in 1992, which was later transferred to his son's account.
[13] Yang also claimed that James Soong kept NT$470 million in the bank account of Chen Pi-yuan, his sister-in-law.
[18][19] With the help of legislative colleague Chen Zau-nan, Yang added more charges, among them embezzlement, fraud, breach of trust, money laundering, and expanded the number of accused, which included James Soong, his wife, son, and sister-in-law, as well as an assistant, Yang Yun-tai.
[25] In February 2022, Yang was questioned during a joint investigation by the Ministry of Justice's Agency Against Corruption and the Yilan County Prosecutors' Office.
[26] Investigators later stated that they had tracked nearly NT$100 million in transfers, dating to the early 2000s, from Yang to Lin Zi-miao and her relatives.