Governor Rick Snyder is facing requests to clarify when he learned about a deadly outbreak of Legionnaires' disease during the Flint water crisis.
Synder told Congress in March 2016 that he "didn't learn of that until 2016".
U.S. Rep. Trey Gowdy of SC, the Republican chairman of the U.S. House Committee on Oversight and Government Reform, and U.S. Rep. Elijah Cummings of Maryland, who is the ranking Democrat on the committee, wrote to Snyder in light of recent sworn testimony by a Snyder aide that contradicted what Snyder told the committee about when he learned of a spike in Legionnaires' disease cases in the Flint area.
While Harvey Hollins, director of urban initiatives, told a judge last week the governor learned about it before Christmas of 2015.
"If necessary, you may also choose to amend or supplement your testimony".
They then noted that it is a crime for a witness to commit perjury, to "knowingly and willfully" make any false statement or to "corruptly" influence, obstruct or impede a congressional investigation.
Hollins said Snyder told him in December that he had not been aware of the Lengonnaires' issues before Hollins informed him. The outbreak wasn't publicly announced until Snyder and his health chief held a news conference in January 2016.
Snyder, who testified under oath in Washington, D.C. when the lead contamination of Flint's drinking water was in the national spotlight, told the committee he learned about the Legionnaires' disease outbreaks one day before he made the health issue public at a January 13, 2016, news conference. Prosecutors allege that a timely announcement could have saved lives.
Lyon, director of the Michigan Department of Health and Human Services, is charged with involuntary manslaughter and misconduct in office for his role in the Legionnaires' outbreak, a surge that coincided with the city's use of the Flint River as its water source in parts of 2014 and 2015.