FILE - In this Jan. 6, 2021 file photo, Trump supporters try to break through a police barrier at the Capitol in Washington. With riot cases flooding into Washington’s federal court, the Justice Department is under pressure to quickly resolve the least serious cases. (AP Photo/Julio Cortez, File)

WASHINGTON - Former acting Defence Secretary Christopher Miller is scheduled to testify next week about the Pentagon's role in responding to the deadly Jan. 6 riot at the Capitol, the latest in a series of high-profile congressional hearings centred on the insurrection.

Miller is expected to appear Wednesday before the House Oversight Committee alongside former acting Attorney General Jeffrey Rosen and District of Columbia Police Chief Robert Contee III in a hearing titled, “The Capitol Insurrection: Unexplained Delays and Unanswered Questions."

It is one of several Jan. 6-related hearings scheduled for next week.

Miller will almost certainly be asked to respond to complaints raised at previous hearings that the Defence Department took too long to dispatch the National Guard to the Capitol despite pleas for extra assistance from the Capitol Police several hours earlier.

Army and Pentagon leaders have repeatedly denied any efforts to delay or deny the Guard response, and say the movement of the troops was approved quickly but took time to actually complete. Guard members were scattered around the city posted at intersections, and they had to return to the armoury, get riot gear and other equipment, get their new orders and explanation of their new mission before they were sent to the Capitol.

Miller denied in a Vice News interview in March that the response was unduly slow, saying, “It comes back to understanding how the military works." He said “this isn’t a video game,” adding "it’s not ‘Black Ops Call of Duty.’”

Other hearings set for next week are House Administration Committee sessions with Capitol Police inspector general Michael Bolton, whose latest Jan. 6-related report focused on the agency's counter-surveillance authorities as well as threats made against lawmakers, and Christopher Failla, the architect of the Capitol.

Rep. Rosa DeLauro, a Connecticut Democrat and chair of the House Appropriations Committee, said this week that a $2 billion supplemental spending bill that the House is expected to take up soon will have a focus including increased training, intelligence analysis and capabilities.

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Associated Press writer Lolita C. Baldor in Washington contributed to this report.

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News from © The Associated Press, 2021