Blood on the Ice is broken and the wiki won't admit it

Blood on the Ice has been bugged since launch and I'm convinced nobody actually finishes it on their own. I just spent two hours trying to get the quest to progress past the second clue stage and it kept failing to trigger the next objective. Checked my mods (just USSEP, nothing crazy), reloaded, tried talking to every NPC in Windhelm again. Nothing.

Finally console commanded it forward because I wasn't about to abandon a whole questline over a broken trigger. But here's the thing - I've done this quest maybe six times across different playthroughs and I swear it breaks differently each time. Sometimes the journal updates but NPCs won't talk to you. Sometimes you get stuck on the "investigate the graveyard" step. Sometimes Calixto just won't show up for the finale.

Has anyone actually gotten this quest to run smoothly without console intervention or just reloading an old save? I feel like the quest design itself is solid but whatever's under the hood is just janky as hell. Curious if this is a known issue that USSEP is supposed to fix but doesn't, or if I'm just unlucky.

USSEP does fix a bunch of Blood on the Ice stuff, but yeah, that quest has some genuinely stubborn issues baked into the vanilla code that even the Unofficial Patch can only patch so far. The investigation stage triggering is one of the worst offenders - there are like three different ways the quest can soft-lock depending on what order you talk to people or if you accidentally pickpocket something before the quest expects you to.

The Calixto finale not triggering is usually a cell reset issue or a dialogue flag that didn't fire right. If you're getting stuck on graveyard investigate specifically, that one's often tied to whether you actually entered the graveyard cell in the right way - like if you fast traveled or used a different entrance than the quest intended, it can miss the trigger. Honestly, the quest is just poorly threaded together.

Have you tried doing a clean save before the quest starts? Not a full new game, just loading a save from before you picked up the investigation in Windhelm? Sometimes the quest state gets corrupted mid-playthrough and a fresh start on it can help. Also worth checking if you have anything else that touches Windhelm or crime scene investigation - even something innocent like a NPC replacer mod can throw off the dialogue flags.