More: The officers' testimony was cited in at least five cases filed by the US Department of Justice amid the unrest. The justice department has charged at least 26 people with "assaulting" and "impeding" federal officers and other crimes during the protests over immigration raids. Prosecutors, however, have since been forced to dismiss at least eight of those felonies, many of them which relied on officers' inaccurate reports, court records show.

The justice department has also dismissed at least three felony assault cases it brought against Angelenos accused of interfering with arrests during recent immigration raids, the documents show.

The rapid felony dismissals are a major embarrassment for the Trump-appointed US attorney for southern California, Bill Essayli, and appeared to be the result of an unusual series of missteps by the justice department, former federal prosecutors said.

The Guardian's review of records found:

Out of nine "assault" and "impeding" felony cases the justice department filed immediately after the start of the protests and promoted by the attorney general, Pam Bondi, prosecutors dismissed seven of them soon after filing the charges.

In reports that led to the detention and prosecution of at least five demonstrators, Department of Homeland Security (DHS) agents made false statements about the sequence of events and misrepresented incidents captured on video.

One DHS agent accused a protester of shoving an officer, when footage appeared to show the opposite: the officer forcefully pushed the protester.

One indictment named the wrong defendant, a stunning error that has jeopardized one of the government's most high-profile cases.

"When I see felonies dismissed, that tells me either the federal officers have filed affidavits that are not truthful and that has been uncovered, or US attorneys reviewing the cases realize the evidence does not support the charges," said Cristine Soto DeBerry, a former California state prosecutor who is now director of Prosecutors Alliance Action, a criminal justice reform group.

She said officers often call for charges that prosecutors don't end up filing, but it was uncommon for the justice department to file, then dismiss cases, especially numerous felonies in rapid succession.

"It seems this is a way to detain people, hold them in custody, instill fear and discourage people from exercising their first amendment rights," DeBerry said.