Protesters run from tear gas.

Police around the world have ‘not learned’ the appropriate times to use tear gas, according to an investigation across 22 countries

Protesters run from tear gas.
Demonstrators, who gathered to protest the death of George Floyd, begin to run from tear gas used by police to clear the street near the White House in Washington, Monday, June 1, 2020. AP Photo/Evan Vucci

Investigations Lab in the News —