In addition to those killed, dozens of women were raped when security forces stormed a pro-democracy rally in 2009, a U.N. investigation found. Eleven men, including the country’s former president, are on trial.

Hakainde Hichilema is hailed as a miracle worker for turning around the fortunes of the southern African country. But with his opposition neutralized and a corruption drive focused on his predecessors, some are uneasy.