Prisoners rely on grievances as an early-warning system for dangerous conditions, from poor medical care to abuse. But in Illinois, experts say the system is sputtering, with little oversight, resulting in injuries to prisoners.

Correctional officers, health care staff and detainees describe how COVID-19 spread through Cook County Jail in Chicago as the sheriff came under fire for his handling of the crisis. “You’re working in a petri dish,” one staffer said.

Internal emails and interviews with key participants reveal for the first time the extent to which leading advocates of the rigged election theory touted evidence they knew to be disproven, disputed or dismissed as dubious.

ProPublica sifted through thousands of videos taken by Parler users to create an immersive, first-person view of the Capitol riot as experienced by those who were there.

The trove of more than 500 videos recovered from a largely pro-Trump social platform provides a uniquely immersive account of the violence and confusion as seen from inside the insurrection.

New video, found in an archive of data uploaded to Parler, includes a fresh look at the mob’s confrontation with Eugene Goodman, the officer credited for luring rioters away from senators during the early moments of the Capitol riot.

The material obtained by ProPublica sheds light on the radicalization of a Jan. 6 defendant whom prosecutors have characterized as a “serious danger ... not only to his family and Congress, but to the entire system of justice.”