The one ethnic group in the USA that needs to conduct "Truth Tribunals" are African Americans. There are a number of organizations that are capable of conducting these tribunals. These tribunals can have international brevity.
The National Memorial for Peace and Justice, (click here) which opened to the public on April 26, 2018, is the nation’s first memorial dedicated to the legacy of enslaved black people, people terrorized by lynching, African Americans humiliated by racial segregation and Jim Crow, and people of color burdened with contemporary presumptions of guilt and police violence.
Any proceedings and ongoing proceedings can be housed here.