One of the best Flash Games I've ever seen!
Great game all around. The visuals were beautifully detailed and I give it huge points for origionality in flash games (there are so few really good point-and-click mystery games). The ending was also neat how it makes sure the player was paying attention through the game. The author obviously put a lot of time and love into this project.
One thing I would change is to mabey reconsider the inclusion of some unimportant clues (I beat the game while missing the glass shards in front of the mirror as a clue the first time, I went back to find the clue I missed later and really gained nothing new out of it).
Also, as another user said, some players may enjoy figuring out who's lying for themselves instead of making it an easy mini-game. Though I understand if others like it just how it is. Perhaps compromise by adding a difficulty settings option? Or an option to accuse anyone of lying than have some kind of penalty for getting it wrong (such as a score that lowers)?
Once again, great game all in all. Can't wait for a sequel!