Murder!
The author's name is :3 so I wasn't expecting this game to be the last word on the subject, though it may be one of the first few.
In this teeny CYOA, you're a girl who goes to school one day and hears that another girl has been murdered, and that no one knows whodunnit or why. This situation is all the talk amongst the kids, especially the few you might interact with in the course of Murder. These kids have a good way with the breathlessness and exclamation marks, and are the kind who will start screaming out "I DIDN'T DO IT!" with little prompting. The feel of the dialogue and character behaviour reminds me of that of the hot and cold bobble-headed folk in the MySims console games.
Unfortunately, I have probably already given the false impression that there is way more content in Murder than there is. Its choice structure for the duration of its handful of scenes consist entirely of: "Will you A or B?" You can play the whole game to its bizarrely abrupt finale in two minutes or less, then click through all the choices you missed the first time for a second play of about one minute in length.
Murder (the game) is cute and actually got me involved in spite of its tiny size, but it's also typo-filled and super simple, and its story stops just when it was getting started.