(Reuters). – Since January 6, 2021 the Democratic-led U.S. House of Representatives selected committee has been investigating the Capitol attack. It’s been almost a full year of work, including interviews with witnesses and gathering documents in preparation for public hearings which will start Thursday.

These are facts regarding the investigation.

MULTIPLE DEATHS

In an attempt to prevent U.S. legislators from officially certifying Donald Trump’s defeat to Democrat Joe Biden in 2020, thousands of Trump supporters attacked Capitol. This caused millions in damages. The attack resulted in four deaths and one death of a Capitol Police officer fighting the rioters. At the time of this attack, four officers were killed and 140 more were wounded.

THE COMMITTEE

On the panel, nine House members are represented by Nancy Pelosi (Democratic House Speaker), who created it on July 1, 2021 following Republican opposition to the creation of a bicameral commission.

Bennie Thompson is the chairperson of the panel, along with Representatives Zoe Lofgren (Elaine Luria), Adam Schiff and Pete Aguilar.

Two Republicans on the panel, Adam Kinzinger and Liz Cheney, the vice-chairperson, were censured for participating by the Republican National Committee. It was the first time that an RNC committee had censured a Republican sitting in Congress.

THE INVESTIGATION

Over 1,000 interviews have been conducted and deposed by the investigators. The majority of those interviewed are not identified. However, Trump’s close advisor and daughter, Ivanka Trump and her husband Jared Kushner and Rudy Giuliani have been known to appear.

In order to obtain documentation and compel testimony, the committee announced that 99 subpoenas were issued. However, it is not known if there have been more.

A number of notable subpoenas were sent to Mark Meadows (a former Congressman who was a Trump White House Chief of Staff); Steve Bannon, an ex-Trump adviser; Roger Stone; Trump’s son Eric, major social media companies; and the leaders of far-right Proud Boys, Oath Keepers, groups that backed Trump.

Over 140,000 documents have been accumulated by the committee. 472 tips were received from its tipline.

CONTEMPTATION OF CONGRESS

Four Trump associates were charged for contempt by Congress after the House voted in favor of them. Trump has asked former aides for their support in disregarding subpoenas by the committee.

According to House recommendations, the cases – Bannon and Meadows, as well as former Trump Administration aides Peter Navarro & Daniel Scavino – were referred to the Justice Department for a decision on criminal charges. These can carry a maximum of one year imprisonment and a $100,000 fine.

Bannon was charged by the Justice Department in a case due to begin in July. Navarro is also being tried. They have not yet charged Meadows nor Scavino.

Jeffrey Clark was also recommended by the committee to be charged. Clark was a high-ranking official in Justice Department during Trump’s administration. After Clark took a deposition and agreed to the charges, no vote was taken by the full House.

CRIMINAL PROSECUTIONS

Nearly 850 have been held for offenses related to the attack against the Capitol. There were more than 250 people charged with impairing or assaulting police officers. About 90 of those arrested were charged with using deadly or dangerous weapons, or causing bodily injury or death to an officer.

Over 300 individuals have pleaded guilty or not guilty to federal offenses, with 59 being felonies.

Sixteen individuals who belonged to or were affiliated with right-wing Proud Boys or Oath Keepers were charged with seditious conspiracies, which can carry a maximum of 20 years in prison.

Six people were found guilty in trials.