The top Democrat on the House Government Oversight and Reform Committee blasted Michigan Gov. Rick Snyder on Monday after receiving his written answers to committee questions on the Flint water crisis, particularly about the governor deleting emails.

Rep. Elijah Cummings of Maryland reiterated his concerns that Snyder may have perjured himself when he testified before the committee in March. He said Snyder wrote in testimony recently submitted to the committee that he may have deleted emails related to the crisis and said that he didn’t remember “key facts.”