Nike announced Sept. 4 that Kaepernick was the face of its 30th anniversary "Just Do It" campaign. Kaepernick has drawn controversy since he began kneeling during the national anthem in 2016 to draw attention to racial inequality.
Activist Shaun King posted a photo Wednesday of 12 inmates wearing a black Nike T-shirt.
"(Roberts) is putting Nike T-shirts on people they arrest and making them wear them during mugshots," King wrote on Twitter. "Disgusting."
In response, the sheriff removed all booking images from the website about an hour later, the Democrat-Gazette reported. Before the images were removed, 20 of 193 inmates were pictured in the shirt.
Roberts told KLRT the shirts were given to people without proper attire or if they were wearing a work uniform.