WASHINGTON - An activist group teamed up with artist Don Perlis to install a billboard in D.C. to commemorate the death of George Floyd – and to call out for social justice.DOWNLOAD: The FOX 5 DC News app for local breaking news and weatherThe picture shows in stark detail the violent act that took the life of the Minneapolis man – when a police officer locked his knee into Floyd’s neck and refused to move despite his pleas.The incident sparked demonstrations and outrage nationwide – including some protests that devolved into clashes between police and protesters.READ MORE: Teen who filmed death of George Floyd to receive courage awardThe picture is paired with a quote from Martin Luther King, Jr.: "Injustice anywhere is a threat to justice.