A retired Nicaraguan army officer in exile turned fierce critic of the country’s authoritarian president Daniel Ortega has been shot dead in neighboring Costa Rica. Maj Roberto Samcam, 66, was shot at his apartment building in San José on Thursday, reportedly by men pretending to deliver a package. “It was something we did not expect, we could not have imagined it,” said Samantha Jirón, Samcam’s adoptive daughter. Nicaraguan rights groups and exiled dissidents immediately blamed the government of Ortega and his co-president wife, Rosario Murillo. “Roberto was a powerful voice” who “directly denounced the dictatorship” of Ortega, Samcam’s wife, Claudia...