Mother recounts how her young son was tortured to death by Syrian authorities in city of Homs.

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 beleive 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.

Click here to watch part one of our exclusive report on Syria: Al Jazeera reports from embattled Homs

Click here to watch part two: Al Jazeera meets Syria citizen journalists