Steward Health Care's Ralph de la Torre, who is stepping down as the bankrupt private hospital network's chief executive, on Monday sued a U.S. Senate committee which has voted to hold him in contempt for refusing to testify about Steward's financial troubles.

Steward Health Care CEO Ralph de la Torre filed a lawsuit Monday against a U.S. Senate committee that pursued contempt charges against him for failing to appear before the panel despite being issued a subpoena.

Ralph de la Torre, the embattled chief executive officer of the bankrupt Steward Health Care System, sued a US Senate committee that subpoenaed him to testify about his role in the hospital chain’s financial collapse.