Thanks! I think I found the problem door and updated the walkthrough, if you're still interested.
Viewing post in The Butler Did It! jam comments
I followed the walkthrough, and it worked. I think your scenario is good so far, but I think the way the trial portion is presented could be better. I'm not sure what the difference is between the answer mentioning the voice and the one mentioning the start of the night. It was also to tell what to look for when analyzing the scene.