announced an array of felony charges against Crumbley, including four counts of first-degree murder.Bouchard said the school had contact with Crumbley both the day before and the day of the attack due to his behavior in class. “In fact, the parents were brought in the morning of the shooting and had a face-to-face meeting with the school,” said the sheriff.Bouchard also said that an individual heard knocking on a classroom door in widely shared footage taken on Tuesday was not in fact Crumbley, but may have been a plainclothes officer. Credit: Oakland County Sheriff’s Office via Storyful">