Frankly as Indians we are way too mild and politically correct. Two Italian marines kill an India, and we allow them to go home? One American killed thousands of Indians in the world's worst industrial crime (not accident), and we allowed him out and back to the US?
I pray that this Indian is not chopped and sent back home alive. But if he is not, the Indian government should not waste a single day in picking up a random Saudi, charge him with something, hold a trial in court, sentence him to death, and execute him. Or her. And it needs to be done within 24 hours.