SAN JOSE, Costa Rica — Costa Rican authorities said Friday they had arrested four people in connection with the killing in June of a retired Nicaraguan military officer and outspoken critic of President Daniel Ortega.

Roberto Samcam, 67, was shot dead on the morning of June 19 when police said a man entered his condominium complex in the northeast of the Costa Rican capital, San Jose.

The retired major was shot multiple times with a 9mm pistol, according to Costa Rica’s Judicial Investigations agency. The gunman escaped.

Samcam had been living in exile since July 2018 when paramilitaries assaulted his home in Nicaragua.

The agency said Friday its agents carried out three raids in which they captured three people in an area on the north side of San Jose. Another suspect was arrested Thu

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