The Americas

Another suspect arrested in killing of Honduran activist

FILE - In this March 16, 2016, file photo, a woman holds up a poster with a photo of slain environmental leader Berta Caceres, during a protest march in Tegucigalpa, Honduras. Authorities said that unidentified gunmen killed Nelson Garcia, a colleague of Caceres, who was slain almost two weeks ago in similar circumstances. Honduran authorities announced Thursday, Sept. 8, that they have arrested a sixth suspect in the March killing of environmental activist Berta Caceres. (AP Photo/Fernando Antonio, File)

FILE - In this March 16, 2016, file photo, a woman holds up a poster with a photo of slain environmental leader Berta Caceres, during a protest march in Tegucigalpa, Honduras. Authorities said that unidentified gunmen killed Nelson Garcia, a colleague of Caceres, who was slain almost two weeks ago in similar circumstances. Honduran authorities announced Thursday, Sept. 8, that they have arrested a sixth suspect in the March killing of environmental activist Berta Caceres. (AP Photo/Fernando Antonio, File)  (The Associated Press)

Honduran authorities have arrested a sixth suspect in the March killing of environmental activist Berta Caceres.

The head of the country's criminal investigation unit identifies the suspect as 21-year-old Elvin Heriberto Rapalo Orellana. Investigation chief Ricardo Castro says Rapalo Orellana is known by the nickname "El Comanche."

Castro said Thursday that Orellana was the last suspect sought in the killing.

The other arrested suspects include an active duty army officer and at least one man who worked for a hydroelectric project opposed by Caceres.