mystery short story

once upon a time there were these four 9th grade students named Jack, Joe, Mary, and Billy. Now Jack, Joe, and Mary have been best friends since the first grade. Billy just recently moved to Swagg City, Alaska where Jack, Joe, and Mary all live. They go to Swagg high school and are very known for their athletic achievements. Jack and Joe are the best basketball players on the Freshmen basketball team. Mary has always been the best swimmer in the state since the seventh grade. But Jack and Joe aren't happy because once Billy moved there, because he stole the basketball highlights by being the first freshmen to pay on the Junior Varsity team in school history. Now Joe and Mary were middle school sweethearts there seventh and eighth grade year until Mary started to have feelings for someone else. Well Joe isn't to happy about this because he recently figured out it was their good friend Billy. Billy has no idea that Mary likes him but Mary is destined to tell him someday soon and be with him. Joe acts likes he doesn't know because he isn't supposed to know because Jack was told by Mary and Jack thought it would be good for Joe to know so that he could move on and find somebody else. Well in the mix of all of this things the a turn for the worst when the high school principle find Billy murdered on the center of the gymnasium floor with only a bloody knife by his side. Investigators thought he might of committed suicide because his mom had past away two years before and it had impacted him heavily but then they thought, why would he kill himself with potential to go to the NBA and is known as one of the most popular kids in school. So they came to a decision that it was a suspected homicide. The first thing they did was check the knife to see if there were any fingerprints or evidence of the person that killed him. They had no lead into who had done this horrible crime and meanwhile Mary was heartbroken because the boy she had been wanting to be with was just murdered. So the only thing the investigators could really do is sit down with every student and teacher and question them all and hope that nobody knows something. they started off with Billy's closest friends. The first asked Joe and Jack because that's who Billy has been spending most of his time with on and off the basketball court. The investigators first asked if they had knew anything about Billy's death and they both said they knew nothing about it and were quite upset that they were in there for questioning when  they were Billy's too best friend. Next up was Mary. They asked her 3 times before answering, raising much suspicion. But they still didnt believe that she did it because she liked him so much before and they didnt know why she would kill somebody she was so in love with. After questioning everybody in the school they still had no idea who had killed this innocent boy. Years on went by and the investigators still never found who had killed billy until they found a note in Jacks locker senior year. The note said plot to kill Billy and they soon took him into questioning. He then addmited he killed Billy and he said the reason he did it was to protect his friend Joe's feelings. He thought it wasnt right for Billy to come in and steal Joes's girlfriend of two years. So they convicted Jack of life in prison and other than Jack or Billy everybody lived a happily ever after