The swearing in of Zimbabwe's new President Emmerson Dambudzo Mnangagwa is being hailed as opening a new era for the country that had been ruled by Robert Mugabe from independence in 1980 until his dramatic downfall this week. But Mnangagwa had long been Mugabe's right-hand man, and in his inaugural speech paid tribute to him as a "mentor" and Zimbabwe's "founding father." Mnangagwa is known by the nickname "Ngwena" (Crocodile)—apparently a reference to his days as a commando in the Crocodile Group, an elite Chinese-trained guerilla unit that carried out acts of sabotage in the struggle against colonial and white supremacist rule in the 1960s. (BBC News, CNN, VOA) But some are pointing to Mnangagwa's reputation for ruthlessness even after the country's liberation from white rule, and are demanding accountability over his role in ethnic massacres in the 1980s.