Roberto David Castillo is escorted by penitentiary police to hear the verdict in his trial connected to accusations that he is one of the intellectual authors responsible for the murder of environmentalist and Indigenous rights activist Berta Caceres, in Tegucigalpa, Honduras, July 5, 2021. Elmer Martinez / AP TEGUCIGALPA, Honduras — A Honduran man was convicted of homicide Monday in the 2016 killing of Berta Cáceres, a prize-winning environmental and Indigenous rights defender. After a three-month trial, the court unanimously found Roberto David Castillo Mejía guilty of participating in the killing of Cáceres, a member of the Lenca Indigenous group who led opposition to a dam project in which Castillo Mejía was involved.