Cam Newton wore a T-shirt that quoted Martin Luther King Jr. during his warmup for Carolina's game against the Vikings.
The dark shirt was emblazoned with the quote: "Injustice anywhere is a threat to justice everywhere" across the back.
Newton earlier this week called the fatal shooting of a black man by a Charlotte police officer "embarrassing," touching on a "state of oppression in our community."
Dashboard camera footage of Keith Scott's shooting was released Saturday night and prompted a fifth day of protests in Charlotte. There was a heavy police presence around Bank of America Stadium before Sunday's game.
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