Its definitely Hemal........here's why.....

They have ben very obviously pointing the "expressions" on Subodh........so its not him.......SURPRISE FACTOR.....

True. Also felt that Gudiya's father is not really sick. They r making it up to get Gudiya out of the way to protect her feelings before they all come down on Hemal.

I agree too...also, since the beginning they hav shown dat pravin does not like hemal and taunts him all the time...and now it can be dat pravin did all this 2 save him and this will show how much he loves hemal

I think so too that it is Hemal.

am a bit lost. I think I missed some part - how is Hemal or Subodh involved in the deaths?

yes....n it does turn out to b Hemal😳