(WWJ) -- A 15-year-old Oxford High School student has been charged with the deadly shooting that rocked the suburban Detroit community Tuesday.
Here are the new details we learned on Wednesday.
• Ethan Crumbley, a sophomore at Oxford High School, was arraigned in an Oakland County courtroom.

Crumbley is charged with the following:
• One count of terrorism resulting in death
• Four counts of first-degree murder
• Seven counts of assault with intent to murder
• 12 counts of using a firearm in the commission of a felony
• Crumbley was transferred to the Oakland County Jail and ordered held without bond. He stood silent to the charges, and a plea of not guilty was entered on his behalf.
• The teen and his family have not been cooperating with investigators.
• A fourth Oxford High School student died Wednesday morning: 17-year-old senior Justin Shilling. Authorities previously released the names of three other students who died Tuesday: 14-year-old Hana St. Juliana, 16-year-old Tate Myre and 17-year-old Madisyn Baldwin.
• Of the seven other people injured in the shooting, three remained in the hospital Wednesday:
• A 17-year-old girl was listed in critical condition with a gunshot wound to her chest.
• A 14-year-old girl, who was shot in the neck and chest, was upgraded to stable condition on Wednesday. Previously, is was reported she was on a ventilator in critical condition Tuesday and Oakland County Sheriff Mike Bouchard said it was "looking very tough" for her.
• A 17-year-old girl, who was shot in the neck, was listed in stable condition.
• Three other victims have been treated and released from hospitals -- a 14-year-old boy was discharged Wednesday, a 15-year-old boy, a 17-year-old boy and a 47-year-old female teacher were all discharged Tuesday.
• During Crumbley's arraignment, Oakland County Sheriff's Lt. Tim Willis said investigators recovered two separate videos from the teen's cell phone he made the night before the shooting, expressing his desire to kill students at the school. Authorities also say they discovered a journal with similar thoughts.
• Bouchard said the teen met with school administrators twice this week -- including the morning of the shooting, with his parents present -- regarding "concerning behavior" in the classroom. Citing the ongoing investigation, Bouchard said he could not disclose specific details of those meetings.
• Bouchard said the sheriff's office was not aware of the videos or the meetings prior to the shooting.
• Investigators have finished processing the crime scene at the school, but continue to investigate. Authorities continued interviewing students, combing social media and asking the public for any and all tips.
• School surveillance video showed Crumbley exiting a bathroom and opening fire on students in a hallway.
• The sheriff says while there has been some speculation about bullying, there is no indication Crumbley was ever bullied. "I have also asked the school if they had any records of him being bullied, and the coordinator of anti-bullying programs has no information that he had been bullied by anyone," Bouchard said.
• Oakland County Prosecutor Karen McDonald said the teen's parents could be facing charges in relation to "responsible gun ownership." Bouchard announced Tuesday night that Crumbley's father had purchased the gun last week.
• McDonald said prosecutors believe this was clearly a case of premeditation, and that the shooting "was not an impulsive act." She said that charging Crumbley as an adult is the best way to keep the public safe.
• Authorities have not yet revealed a possible motive for the violence, though Bouchard said so far there was no evidence that he was bullied. "There's nothing that he could have faced that would warrant senseless, absolutely brutal violence on other kids," Bouchard said during Wednesday's news conference.