ok im with the stormcloaks (completed), PS3 version, latest patch, dont think ive completed mourning never comes, ive been too and from windhelm about 15 times and still no luck, also ive been inside the house without starting the quest found the key, got the amulet havent managed to get it to necromancer, it wouldnt let me investigate anything also.
You'll also need to enter the city (not just be in, but
enter, via gate, fast travel, whatever) between 7pm and 7am. Then make your way to the cemetary area to find the guard who will give you the quest.
oh and i thing tova shatter-shield is dead, thats where i found the key
...oh. Oops.
