The Supreme Court has upheld the right of Americans to record police officers on the job. They did so by refusing to hear a case brought by the ACLU against Illinois's anti-eavesdropping law. Prior to the SCOTUS decision, Illinois residents could receive 15 years in prison for recording police officers.
By declining to hear the case, the court left in place a lower court opinion issued in May that found Illinois's anti-eavesdropping law to be a violation of free speech rights. The lower court didn't overturn the law, but ruled that police officiers were barred from enforcing it. The law stated that civilians cannot record police, even in public, without their consent.
An appeal filed against that ruling by an Illinois state attorney argued that the lower court decision was detrimental to law enforcement and endangered the public as it could make potential witnesses wary of speaking frankly with law enforcement.Via the Chicago Tribune and Politico