<p>Before leading a group of equestrians on a Juneteenth horseback ride through Chicago’s South Side, Murdock circles them up at Washington Park for a pep talk.</p><p>The 78-year-old horseman, who goes by Murdock — just Murdock, no first name — is president of the Broken Arrow Horseback Riding Club.</p><p>He reminded the group of around 20 riders about the rules of the road. Illinois law allows horseback riding on roads, but not highways. Murdock told them to stay to the right side of the road, be mindful of cars and that they have the right of way.