The House Oversight and Accountability Committee’s chairman plans to subpoena US Secret Service Director Kimberly Cheatle for testimony on the assassination attempt against former President Donald Trump, a spokeswoman for the panel said Tuesday, Report informs via CBS News.

Cheatle is set to appear before committee members for an oversight hearing on July 22, Chairman James Comer, a Kentucky Republican, announced Monday. While the Secret Service also agreed to brief lawmakers on Tuesday, the panel’s spokeswoman said, the Department of Homeland Security “took over communications” with the committee and has not confirmed a time for the briefing.