Transcript for Top police officials speak out about Capitol Hill riots in hearing
first congressional hearing on the capitol hill siege. The top security officials in charge were grilled about why they were caught off guard by the violence. Our chief justice correspondent Pierre Thomas has the story. Good morning. Reporter: Good morning. In the wake of that disaster, the time has come for critical questions to be answered and the early picture so far is not flattering. This morning, as a new round of testimony on the deadly insurrection gets under way, the three men in charge of securing the capitol that day say they did not see the chaos coming. None of the intelligence we received predicted what actually occurred. What we got as a military-style coordinated assault on my officers and silent takeover of the capitol building. Reporter: Former capitol police chief Steven sound who resigned after the riot along with two other officials in charge said he never saw the attack of that scale coming and those former security officials appeared to point the blame at the FBI and at times each other. Sund claiming he never saw an FBI bulletin sent a day before the riots warning that right wing extremists were preparing to wage a, quote, war in Washington. The fact it did not get to key leaders and the sergeant-at-arms or the capitol police chiefis, of course, very disturbing. Really on both ends. Reporter: Critics of those officials who were forced out aren't buying their excuses saying there was a wealth of evidence pointing to the potential for significant violence. And that the warning came as Washington was bracing for a massive trump rally with thousands of angry protesters flooding into the city to oppose Biden being certified by congress as president. All this as authorities continue their race to arrest and apprehend the criminals who unleashed the terror that day. More than 230 people have been charged so far. At least 9 of them former or current law enforcement officers including former NYPD officer Thomas Webster who prosecutors say summoned pure rage to unleash violence on a capitol police officer with a metal pole. Those former security officials also squabbled over why the National Guard presence was not bigger to start and why it took them so long to get there. Robin. Many want to know that. All right, Pierre, thank you.
This transcript has been automatically generated and may not be 100% accurate.