Chelsey and the Green-Haired Kid by Carol Gorman

Chelsey may be wheelchair bound, but she has to solve who pushed the kid off the back of bleachers. The kid died right in front of her and either the green-haired kid is another witness or involved in the murder. If the murder killed once, she could be the next victim, especially if the killer wants no on left to identify him to the police. Why would anyone want to kill someone at a high school basketball game? Why does the green-haired kid wants nothing to do with solving this unless he might be involved? I read this almost 20 years ago and if a book sticks in your mind that long after reading so many more great books, you know it has to be good. Mystery lovers, see if you can solve this before the author does it for you.