SANTO DOMINGO (Reuters) -The Dominican Republic’s environment minister, Orlando Jorge Mera, was shot dead in his office on Monday, authorities said. A spokesman for the president’s office, Homero Figueroa, said in a video posted to Twitter on Monday afternoon that a suspect, identified as Miguel Cruz, was arrested. Figueroa said Cruz was a childhood friend of the minister, without giving a potential motive for the attack. Employees at the Ministry of Environment and Natural Resources told journalists that they heard at least seven shots from within the building. Police units arrived on the sce…