A second teenager involved in the Evergreen Middle School planned attack in Cottonwood was found guilty of three felony charges. The plan apparently was to attack the school May 9th. Last month a judge found a 15-year-old boy guilty of attempted first degree murder and additional felony charges for making and possessing a destructive device. He was sentenced to 4 years in secure youth treatment, with a maximum confinement of 7 years depending on his level of cooperation while locked up. The 14-year-old appeared in Tehama County Court on Wednesday for a contested hearing, according to the Tehama County District Attorney’s Office. During the trial, he was found to have committed the felonies of conspiracy to commit murder, possession of materials with intent to construct a destructive device and possession of a destructive device. Initially the teenager was also facing a fourth charge of attempted murder, however, the court found him not guilty of that charge. He will appear in court again on October 15 for sentencing. Until then, he remains in custody.