A very interesting mystery!
I probably say this all of the time, but I think it'd be very good if there are walkthroughs for these games - Can't find them on Youtube and at some points it's getting a bit too convoluted.
Otherwise the game itself is pretty solid - I like most of the artwork, music is neat , easter eggs and jokes are funny, and the atmosphere is just about serious enough - not too much, not too little. Neat!

A lot of reading but the characters were really well done and I liked the little quips as I explored.  I thought I figured it out but know I missed something because I can't accuse the murderer.  Overall, well done though!  I enjoyed what I played. 

Side note: passibility of outside windows allows player to walk up the mansion.
Nice work on those maps though!  Also, where did you get those music tiles? 

A well mad game, at first, I felt like the game was over after the Dracula is Dead flashed. 

BTW, a lot of texts to read, and patiently waiting to know the ending is the only game I could see here. Could have been better in terms of presentation.