http://www.slate.com/articles/news_and_politics/crime/2015/07/sandra_bland_is_the_bail_system_that_kept_her_in_prison_unconstitutional.html

The reason Sandra Bland was still in jail three days after being arrested was that she hadn’t posted the $5,000 bond that had been set for her by a Waller County, Texas judge. Posting that bond would have required Bland to come up with $500—10 percent of the full sum—in exchange for her freedom. According to a lawyer for the Bland family, they were working on securing the necessary funds when Bland was found dead in her cell on the morning of July 13.