[4] In January 2004, he and Wellington Koo were two of six Taiwanese lawyers selected by the Straits Exchange Foundation to represent taishang who had been accused of spying in China.
[2][7] After Taipei County Council member Wu Shan-jeou was shot and killed, Lee argued for amendments to the Statute Regulating Firearms, Ammunition, Knives and Other Deadly Weapons, favoring harsher penalties.
[16] He led the 2009 impeachment of former Transportation Minister Lin Ling-san, who was found to have made illegal investments in Taiwan High Speed Rail.
[21] After civilians broke into a military compound in December 2011, Lee and Huang began an investigation into the Republic of China Army's security measures.
[22] In 2012, Lee and Teresa Yin moved to impeach National Taiwan University Hospital director Ko Wen-je for an oversight in organ donation and transplantation.
[24] Shortly after the April 2014 execution of Liu Yen-kuo as ordered by Justice Minister Luo Ying-shay, Lee began review of the case, as he suspected a violation of due process.