I don't know what his custom is? Are they Hindu and get cremated or are they Christian and are buried? Because I am pretty sure for the body to travel it will need to be embalmed. You should be able to contact an Airline (Air India?) and arrange transport once the remains have gone through the process. This isn't cheap and can cost quite a bit.

http://www.airindia.in/cargo-type.htm

Sentimental Shipments

We understand how traumatic it is to lose a dear one. That’s why we make sure the mortal remains of the deceased are always carried with utmost care and concern.

Besides passport of the deceased, the following documents are required for carriage of sentimental cargo:

    Death Certificate from a competent medical authority

Embalming and Packaging Certificate, Certificate issued by Embassy (Nationality of deceased) with the deceased’s full name, age at the time of death, place of death and photocopy of passport details. Photocopy of cancelled passport,Police certificate.

It is necessary that the above documents are made in English, otherwise the same should be translated in English.