A.C. Thompson is a staff reporter with ProPublica. His stories, which often examine the criminal justice system, have helped lead to the exoneration of two innocent San Francisco men sentenced to life in prison and the prosecution of seven New Orleans police officers.
In the group, current and former Border Patrol agents joked about the death of migrants, posted vulgar images of Alexandria Ocasio-Cortez, and shared racist memes.
Under President Barack Obama the agency was under the microscope for reform, but under the Trump administration any progress toward that goal has been halted.
The postmortem by Michael Baden is only the beginning as teams of specialists study the body of an 18-year-old African American killed by police in Ferguson, Missouri.