PORT-AU-PRINCE—Some of the former Colombian soldiers accused of involvement in the assassination of President Jovenel Moise went to Haiti to work as bodyguards, but others knew a crime was being planned, Colombia’s president said on Thursday. Haitian authorities have said Moise was shot dead at his home on July 7 by a group of assassins including 26 Colombians and two Haitian Americans. Eighteen Colombians have been detained and three others were killed by police. “There was a big group that were taken on a supposed protection mission, but within that group, there’s a smaller group, which were those who apparently had detailed knowledge of what was to be a criminal operation,” Colombian President Ivan Duque told La FM radio. “Does that excuse the rest of the group? Unfortunately no, because they are also participating in the situation.” Colombian news magazine Semana reported on Wednesday that one of the detained Colombians …