Husband and wife found guilty of holding woman as a slave for 8 years
Kumuthini and Kandasamy Kannan appeared at court on Tuesday
The slave had been branded a liar by her captor's defence barrister
Jury heard evidence from the Tamil woman who claimed she was enslaved
She vanished for eight years until found when she collapsed in the house
Kumunthini threw hot tea in her slave's eyes and poured gravy on her head