I think you would need to direct your complaint to the canadian police anyway. Im not a professional so i might be wrong.
But even the indian police should handle it. Maybe they have a cybercrime unit and when you can provide details of the user then you might be lucky.
It's worth a try anyway as long as it doesn't cost you serious money doing so.

He has more chances of survival if he jumped off from the 15th Floor of a building than any help from Indian Cyber Crime Department.I was being scammed by a fake agency for Job Offers in Google India,though I provided all the legal documents for the scam which had the guys phone number ,bank details etc police didnt do jack instead asked me to buy them a new USB for the damn records.A month later the scammer was still looting people with the same job offer through Emails. Not against your opinion but just letting you know how sad Indian Police is .It's better if he doesn't approach them or they will blame bitcoin for everything and maybe ban all the related bitcoin websites.Sorry for being a little off-topic here.
Hm, that is quite a problem indeed then. I know the police in some countries is pretty bad, i thought india might have developed further in that point too.
Well, looks like a general problem then.
The only other way could be then when the canadian police accepts complaints from foreigners on such points.
But honestly, i somehow doubt a bit that his doxx is real. I know there are ways to fake all of this, even when receiving goods at this address. And till now no one has checked him out it seems.
If i would be involved and would have invested alot. Then i would go after him even on a personal level. Visiting him, private investigator and so on. Just to get the coins back or send him to justice.