Is that the Windhelm mission where there is a murderer on the loose? I can't even get that mission to start, even have the key to the house and a diary, and it still won't start.
i did the quest: Blood on the ice and i put the mage in jail insted of talking to him first.. and now the quest is complete..
can i do something to go back.. coz i dont think that i have the save game before that
You will be able to resolve this quest at a later point.
Spoiler
I returned to Windhelm a couple of weeks later and found out the murders hadn't stopped. I talked to the wizard, which set the rest of the quest in motion