The man alleged to have run up The Steps is alleged to be wearing a LONG Sleeve BROWN Cardigan Sweater. What we see here is Nowhere close to the color Brown across this man's entire back. The flesh tone of his (R) Arm/Elbow is also present in this frame. Some might quibble with the degree of Whiteness in the SHORT Sleeve Shirt we see he is wearing, but that shirt is far, far closer to White vs Brown. There is No Contest. And, the Whiteness of his Shirt contrasts with the Darkness of his pants. A brown shirt would Not present this Clash of contrasting colors. Also, in this still frame we can see that patches of the Knoll grass are dying and turning BROWN. This "browning" of the grass is common in The South as the cooler temperatures of Fall/Winter hit that region of the USA. Compare the BROWN patches of grass to the WHITE Shirt that completely covers this man's back. There is No Comparison to the contrasting color of his White Shirt vs those Brown patches of grass that we see in this Nix Still Frame.