US joins Honduran probe of environmentalist's murder

US investigators have joined a Honduran probe into the killing of a prominent indigenous environmental activist who was leading a campaign against a hydroelectric dam at the time of her murder, officials said Tuesday. Berta Caceres, who headed the Civic Council of Indigenous and People's Organizations (COPINH), was brutally assaulted and then shot dead Thursday in her home in the western town of La Esperanza. Attorney General Oscar Chinchilla said a team of US investigators arrived Sunday in La