In fact, it was purely because I wanted to challenge myself, and I had never tried the professional crime-solving type... Cough
However, I believe that I still cannot hide my unprofessional nature.
So professional students can just take a look at it and don't take it too seriously (beat it up), but if there are any mistakes and you are willing to point them out in a friendly way, I will be very happy, just think of it as increasing your knowledge XD