Blood On The Ice won't trigger at all [duplicate]

There are a few possibilities here, according to the uesp entry on the quest

The trigger may take some time as you'll have to wait for the woman to be murdered. Personally I came across the scene in the day time while passing through the area, I did not wait in the graveyard (that may cause the murder to not trigger).

You can also try to trigger the quest by purchasing the house from Jorleif during the stormcloak rebellion quest line.

However, it is known (see the glitches section in the entry) that the quest is bugged and may not start at all, not even via the console. In this case then you are out of luck.

This quest also didn't trigger for me.

To force it, you can pickpocket a Hjerim Key from someone in town (I don't remember who has it, but there are several) and enter the house. (Tova has one.)

However, the quest still bugged for me later -- so you may still need to use the console at some point.