When graverobbing, even when I select corpse who has the same city AND district, I still get the error message:
 

Your arms aren't long enough. Wrong city pal.

I have to try over 10 corpses before I find one that doesn't give me that message. And often, the corpse I dig is not in my city at all.

How to really determine which grave is within my reach?

A user's home city and their final resting place are not always the same. 

That makes sense, but how do I find out where did they die? Or does everyone need to do this using this brute-force method?

https://mafiareturns.com/news/tips.php

Undertaker **** ($20,000)

Locate an untouched grave.

You can chose the above option on the above page and it will provide you with a dead person in your area for the fee of 20k. Other than that the only option that I know of is the method you've already been using.

Well, paying 20k to earn $500 doesn't look like a very good deal.

Yeah, that's what I do. I even opened Obits in another browser window to be able to copy paste names between windows quickly.

It would be nice to have a way to find out the death location. After all if you can visit their funeral then, in universe, it makes sense for you to know where do they lay.

Maybe it should be only allowed to know if you actually visit the funeral during the 24 hr period?

Great info thanx!

Just go into orbit and look after those who ies 2-4 days ago and look up them theit one by one, you find one soon, it can take some time so dont be lazy all of you who doesnt want to pay out 20.000 for the game to show you where the next gravrobbery is, often there you just find 500$ so you loose very much money doing that.

Still waiting for that go go gadget arms perk

Thanks for this thread.  I had same question.

Thank you for this thread, really helpful.

Good to know for future playing! Thanks!

wack him and you know where he died, win win :P

Unless it's a Durden, they move after they die.

I just like to think, what if someone just had really long noodle arms that could reach upon any grave.

Problem in the tip for the grave is once I dug one and got like $14 and usually it's $500 and the tip is 20k so sounds like a bad idea to get the tip.