Prosecutors in Taiwan have charged the captain of a fishing boat with ordering the killing of four suspected Somali pirates eight years ago. The four were shot dead in the Indian Ocean in September 2012. The killings were exposed after a mobile phone containing footage of the incident was left in a taxi in Fiji, and found by someone who posted the video on YouTube in 2014. In the video, four men can be seen in the water, some clinging to debris, as some 40 rounds of ammunition are fired at them. A man is heard giving orders in Mandarin. Prosecutors say the suspect, a Chinese national, admitted ordering the killings while captaining the Taiwanese vessel. The suspect said the alleged Somali pirates shot at his boat and three other boats fishing in the area, before one of the fishing boats managed to knock the men into the sea. Despite knowing the men had no way of defending themselves at this point, the suspect told officials he ordered his Pakistani security guards to shoot them so that they could not get away and ask other pirates to hijack his vessel, prosecutors said. The suspect has been indicted on homicide and gun control charges, according to local media reports.