5 top reasons for this act by the Govt of India:

1) They just killed some fishermen. it's not as if they killed a movie star or a cricketer
2) They wanted to save the public exchequer the expense of a long and pointless trial.
3) It is a gesture of goodwill as India wants to be a part of the EU. (we are connected to Europe via Turkey )
4) Being a prisoner in another country is no excuse for not voting. Long live democracy
5) they promised they would come back.