Ashwini Ashwath

Watched movie. It was worth the watch. Very good. Enjoyed it. Although one question haunts me... How does the paranormal sciences teacher know how exactly sisira's mom was killed? , you see the girl never comes out of the astral projections, but when the teacher is telling about sisira's past to the main actor and other guys he says that the step father of sisira doesnt give inhaler and so her mom died, i also thought that may be the teacher doubts that doctor and the stepfather killed her mom as they both tie him down and lock him up, but what is the explanation of the clear cut description of sisira's mom's death as failure to get inhaler?