On 30 March 2018, during the parliamentary hearing session, a Liberty Korea MP Park Dae-chool said that he received a report, which Yang was at a karaoke in Haeundae on 16 April 2014, the day of the MV Sewol tragedy. Yang at first denied it, but soon Park revealed a statement describing that Yang purchased at a karaoke via KBS credit card on the day of the tragedy. Another Liberty Korea MP, Min Kyung-wook, criticised, "Although he did not breach the law, he kept denying the facts. It means that he disdained the Parliament." In the end, Yang finally apologised.