THE MYSTERY IS IN THE DETAILS

He's innocent.  Wayne Connelly is innocent of bringing and shooting the gun in the school cafeteria.  Colin knows this because there was frosting all over the gun.  Now he just has to find convince Wayne, his own personal bully since the First Grade, to work with him to find proof of his innocence.  High schooler, Colin has Asperger's Syndrome, a form of auttism, but he knows how to investigate and just like his hero, Sherlock Holmes, he must investigate and solve this mystery.  

Colin Fischer by two local authors, Ashley Edward Miller and Zack Stentz, is a fast read, if one skips all the footnotes.  For readers in 6th-9th grade.