This video says about itself:
Inside Pinochet‘s Prisons – Trailer
16 March 2012
In September 1973 Augusto Pinochet, backed by the United States of America, overthrew Chile‘s Marxist but democratically elected government. Under his direct orders the Chilean secret police erected vast prison camps to detain left wing sympathisers. No-one was safe – doctors, lawyers, trade unionists and communists were all rounded up in the night. Held without trial in Pinochet‘s prisons they were brutally tortured and many executed; an attempt by Pinochet to stamp his ideological mark on the consciousness of a nation. Dressed in his pristine white military jacket Pinochet chillingly told the camera, “Marxism is like a ghost, it’s very difficult to catch – even impossible to trap.”
From the BBC:
24 January 2014 Last updated at 20:42 GMT
Chile accuses four men of poisoning prisoners during Pinochet regime
The authorities in Chile have arrested four ex-army officers for allegedly poisoning prisoners during the military government of Augusto Pinochet.
The men are accused of murdering two inmates and attempting to murder five more by adding a deadly poison, botulinum toxin, to their prison food.
They were allegedly testing a method of killing opponents of Mr Pinochet.
The four suspects are already being investigated in the death of ex-Chilean President Eduardo Frei Montalva.
He died in 1982 after going into hospital for what should have been a routine operation.
Recent investigations however suggested he might have been poisoned.
‘Nausea and vomiting’
Two of the accused in the latest case – retired general Eduardo Arriagada, a doctor, and retired colonel Sergio Rosende, a veterinarian – worked in a laboratory run by the National Intelligence Directorate, or DINA, Mr Pinochet‘s secret police force.
Retired colonel Joaquin Larrain and retired army commander Jaime Fuenzalida were charged as accomplices.
The seven prisoners fell ill in December 1981 in a jail in the Chilean capital, Santiago.
They were diagnosed at the time as having acute gastritis.
But they showed the effects of serious poisoning from botulinum toxin, according to a statement released by the judicial authorities on Friday, such as “nausea and vomiting, acute mydriasis, difficulty in speaking… and a dry mouth”.
Two of the men died while the other five survived.
The government of Ronald Reagan was so worried that leftwing opposition to General Augusto Pinochet might erupt into open civil war that in 1986 the US government considered offering political asylum to the Chilean dictator: here.