Washington (CNN) Former Rep. John Conyers, a longtime Michigan Democrat who represented parts of Detroit for more than 50 years before his resignation in 2017, died Sunday at age 90, his son, John Conyers III, told CNN.

A founding member of the Congressional Black Caucus, Conyers was known as pushing a series of liberal causes, especially from his perch on the Judiciary Committee. He at one time served as chairman of the panel.

Conyers' longevity in Congress was punctuated by a contentious resignation in 2017 amid allegations of sexual harassment.

The Michigan Democrat faced an investigation by the House Ethics Committee into multiple allegations that he had sexually harassed women who worked with him when he told a Detroit area radio show that he'd step down from his seat in Congress.

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