I like the initial idea very much. I like the way you describe things, they give me a good idea of what the character looks like. You haven’t introduced a million characters in the prologue, making it relatively easy to keep track of who’s who. As it should be during a mystery, the turns of the plot were unexpected. The concept is rather brilliant.
But with the good comes the bad, and unfortunately the execution is mediocre.
“He thought…” followed shortly by “Kuzo is a 17 year old…” and then goes back to past tense. Changing tense unless one of the characters is recieving a flashback is a little difficult to read. You introduce the characters separately to the actual writing as well and personally I find that painful to read. It is possible to weave characteristics into their regular day before the complication starts. Your grammar is also a little off key.
However if you manage to fix the errors you could have a brilliant story on your hands