The U.S. House committee investigating the Jan. 6 attack on the U.S. Capitol continues hearings Monday morning.

The series of hearings will take place over the next several weeks and began with a prime-time session Thursday night, in which the nine-member panel gave an overview of its 11-month inquiry.

More than 1,000 people have been interviewed by the panel, and only snippets of that testimony have been revealed to the public, mostly through court filings.

Former President Donald Trump’s former campaign manager Bill Stepien abruptly pulled out of Monday’s scheduled appearance, citing a family emergency.

The committee said Stepien’s counsel will appear and make a statement, and pushed back the morning start time by 45 minutes to 7:45 a.m. Arizona time as lawmakers and staff scrambled for the change of plans.

Rep. Liz Cheney of Wyoming, the Republican vice chair of the committee, said lawmakers will present evidence Monday showing that Trump “engaged in a massive effort to spread false and fraudulent information” that the election had been stolen — even though advisers and allies told him repeatedly he had lost.

The panel’s probe has so far been divided into a series of focus areas, including the efforts by former President Trump and his allies to cast doubt on the election and halt the certification of President Joe Biden’s victory; the financing and organizing of rallies in Washington that took place before the attack; security failures by Capitol Police and federal agencies; and the actions of the rioters themselves.

The Associated Press contributed to this report.

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