Yeh Yao-peng

Yeh was elected to the Legislative Yuan in 1992, and stepped down in 1995 upon leaving the Democratic Progressive Party. Subsequently, he was succeeded by Chu Sheng-hao. The next year, President Lee Teng-hui nominated Yeh to the Control Yuan. In 1997, Yeh helped Hou You-yi and Frank Hsieh resolve the Alexander family hostage crisis.[1][2] Yeh left the Control Yuan in 1999. He called for either President Chen Shui-bian or Premier Chang Chun-hsiung to resign in January 2001, as the Executive Yuan had issued an order to end work on the Longmen Nuclear Power Plant without consulting the legislature.[3] Yeh ran as an independent in the legislative elections of 2001, and was defeated.[4] Yeh then invested in Tsingtao Beer.[5] In March 2004, Yeh faced Lo Chih-ming in debates about the cross-strait referendum to be held later that month.[6][7] In October 2004, Yeh was named to a committee convened to investigate the 3-19 shooting incident.[8][9] After the Judicial Yuan ruled to reduce the committee's powers in December, Yeh stated that "justice was interfering with the legislature."[10] He was elected to the National Assembly as a representative of the People First Party in 2005, and subsequently granted a seat on the presidium of its fourth convocation.[11] Yeh later became a political commentator.[12]

The Kuomintang nominated Yeh to a second term on the Control Yuan in March 2007.[13] He was renominated in September 2008,[14] after the Ma Ying-jeou administration took office, and confirmed in November 2008.[15] In 2009, Yeh co-wrote impeachment charges against Lin Ling-san,[16] voted to censure the Ministry of National Defense over its handling of Justin Yifu Lin's 1979 defection,[17] and took lead roles investigating Taiwan High Speed Rail and damage from Typhoon Morakot.[18][19] In 2011, Yeh accepted a petition from the Public Television Service against the Government Information Office.[20] He also participated on reviews of martial law,[21] as well as probes of alleged corruption within Taipei City Government regarding the Xinsheng Overpass project and the International Flora Exposition.[22]

In February 2012, Yeh and the Judicial Yuan began investigating Tsai Ing-wen's ties to the former Yu Chang Biologics Company.[23] Though the Judicial Yuan ended its involvement that August, Yeh's probe continued,[24] aided by colleagues Ma Yi-kung and Ma Hsiu-ru.[25] As the Yu Chang case was pending, Yeh turned his attention to Lin Hsi-shan's investments, resulting in his impeachment.[26][27] Yeh next participated in impeachment proceedings against Taipower executives,[28] then reviewed housing restrictions placed on people accused of crimes.[29] In August 2012, Yeh himself was investigated by the Special Investigation Division of the Ministry of Justice.[30] Later that year, Yeh received a petition to review the death penalty.[31] In February 2013, he announced the Control Yuan's decision to censure the Ministry of Economic Affairs for its failure to review contracts signed by China Steel, which led to Lin Yi-shih facing accusations of bribery.[32] The Control Yuan issued a verdict on the Yu Chang case in October 2013, deciding to censure Tsai Ing-wen.[33] Before he stepped down in 2014, Yeh led a discussion on the statute of limitations for Justin Yifu Lin,[34] and helped Lee Fu-tien and Lin Chu-liang review the implementation of the Communication Security and Surveillance Act.[35]