Former President Bill Clinton was testifying on Friday behind closed doors to a congressional panel about his ties to the late sex offender Jeffrey Epstein, in what could be a tense confrontation between the former Democratic leader and President Donald Trump's fellow Republicans. Clinton's testimony follows that of his wife, former Secretary of State Hillary Clinton, who told the House of Representatives Oversight Committee on Thursday that she did not remember ever meeting Epstein and had nothing to share about his sex crimes. She said she was also asked about UFOs and a 2016-era conspiracy theory during the seven-hour session. Bill Clinton flew on Epstein's plane several times in the early 2000s after he left office, and a tranche of millions of documents released by the Justice Department includes photos of him with women whose faces are redacted. He has denied wrongdoing and expressed regret for his association. Before the sessions, the panel's Republican chairman, Representative James Comer of Kentucky, said he would ask the former president about those photos. The committee is als