The Syrian government has been blamed by opposition groups for imprisoning tens of thousands of protesters calling for reform since the uprising began in March 2011.
Rights groups believe many of the prisoners have been tortured, some until death. Outside the prisons, the government has continued its military crackdowns protests, killing thousands of people across the country.
In the third part of a series of exclusive reports, Jane Ferguson goes inside Homs, one of the main targets of President Bashar al-Assad's security forces.
