spoiler
What Ive always done (or have had happen i guess) is talk to the guards, the lady at candle place and USUALLY they direct me to the steward or Voila and after talking to either of them I leave windhelm until night time then go to the little graveyard they have inspect the body talk to the beggar, museum guy, the priestess and the guard who tells me i need permission... Going back to the steward i get the ok back to the guard who tells me to look around... blood on the ground leading to house, ask around pointed to Shattershields.. with high enough speech the wife will give the key or picklock the door on the "butchers" place... scope around check shyt out leave talk to Voila who blames the wizard, (have journal and amulet) take amulet to museum guy sell (believe you can get it back after you kill him) go to the steward, blame wizard BAM hes arrested... in and out windhelm 3 times 3 days then the second part should start after finding the stable lady on the ground dead, go to the wizard in the jail talk to him blah blah tell you to watch grounds go there (marketplace) either save the girl the freak is sneaking up on or watch her die chase him to the house and kill him there.... the only time i had a glitch with it is when i did the dark brotherhood contract on the sister and the mom commits suicide after both her daughters die
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