Hi, i am totally stuck in day 6. I have no idea what to do next, so I hope you can help me.
I play the german version of the game, but I guess the names are the same in all versions.

What happend so far (better don't read if you have not done this yet ):
- I learned about the incident at the cathedral, examined the building, talked to every person that sent me a note, and was instructed to get informations about the suspicious women.
- I got a blood sample of Anna, analysed it an talked to her again, so I got an entry in the quest book, that she isn't guilty.
- I visited Saburow and Katherina, talked to both and to that girl next to Katherina. I was sure to have asked for a blood sample there too, but I did not find one later in my inventory and have no speech options left there.
- From there I was sent to Laska at the cemetary and talked to her. She told me about some girl hiding near the station.
- I found that girl (Mischa?) and she told me more about Klara and... I think the other name was Mara?
- I got a note from Spishka, talked to him, and looked all around the slaughterhouse for something suspicious. I found nothing yet, but this seemes to be a side quest, so I don't think it is important for my problem.
- To avoid the slaughterhouse raid seems to be another side quest, but i have to wait until evening for this anyway.

At this point I don't see any clues in the questbook, the map or the letters I got, how to continue with the main quest. Wandering around I just died of infection after having used up all my stock of antibiotics and money in this day, so I am really frustrated at the moment.

I found myself in a similar situations some times before, no explicite hints where to continue, and managed to reach the next day only by wandering around and talking to every npc I found. I am a little bit tired of that. The city is too big to find something without having a clue, where to look and what for.

Gz,
Thingol

I remember this place, and the clue is far from being explicit, though the formal clue there really exists. It is in the phrase like "So, she is trying to find me? All the people here know well where I live, I am not hiding it" in dialogue with Laska. If you have not killed steppe creature Albino by the time you spoke to Laska, then you should go home. If Albino was dead at that moment then you are to visit the place where he died.

Hm, I could have sworn that I had checked Evas house before, but it seems I did not. Thanks a lot, that was a great help.