Judge Sarvamangala pronounced the verdict against the two persons.
Sundararajan and his friend Sathishkumar took the woman to a deserted spot on May 29, 2012 and strangulated her with her sari.
They then decamped with her gold jewellery after dumping the body in a nearby burial ground.
Villagers noticed the body the next day and informed police. Investigations led to the arrest of the duo.