Hundreds of convictions, but a major mystery is still unsolved 3 years after the Jan. 6 Capitol riotHundreds of convictions, but a major mystery is still unsolved 3 years after the Jan. 6 Capitol riot - The Associated Press

Three years after the attack on the U.S. Capitol, Washington’s federal courthouse is flooded with trials, guilty plea hearings and sentencings stemming from the largest criminal investigation in American history. And the hunt for suspects is far from over. Au…