The governor objected to a perjury provision in the legislation. That provision would take away badges of police officers if the Illinois Law Enforcement Training and Standards Board found they had committed perjury in a homicide case.
Chicago Urban League leader James Compton says while good police work brings wrongdoers to justice, unethical police work puts innocent people behind bars.
Leaders from the Urban League and other community groups say that provision needs to remain in the legislation.
The governor's partial veto on Tuesday sends the entire legislation back to lawmakers this fall.