This is from NPR (don't want to link them since I detest them).
Unless they are lying and making up stuff, this does not look good for parents.
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The prosecutor describes the parents' conduct before the shooting
The 9 mm Sig Sauer SP 2022 pistol used in Tuesday's shooting at the high school in Oxford Township, a small community north of Detroit, was purchased by James Crumbley at a local gun shop, authorities said. His son Ethan Crumbley was with him at the time of the purchase, they said.
Jennifer Crumbley referred to the gun as their son's "new Christmas present" in a social media post, McDonald said during Friday's news conference. She added that the gun was stored unlocked in a drawer in the parents' bedroom.
The day before the shooting, an Oxford High School teacher reported Ethan Crumbley, a sophomore at the school, after they spotted him using his phone to search for ammunition, the prosecutor said.
School officials left a voicemail and email for Jennifer Crumbley, who did not respond, according to McDonald. But Crumbley sent a text message to her son that said, "LOL I'm not mad at you. You have to learn not to get caught."
Then, on the morning of the shooting, the prosecutor said, Crumbley's teacher found a drawing on Ethan's desk of a handgun, bullet and shooting victim, with the words "blood everywhere" and "the thoughts won't stop, help me."
Disturbed, the teacher informed school authorities, who called both James and Jennifer Crumbley to the school; they were told they would be required to seek counseling for their son.
"Both James and Jennifer Crumbley failed to ask if their son had his gun with him or where his gun was located, and failed to inspect his backpack for the presence of the gun, which he had with him," McDonald said.
The parents "resisted the idea" of Ethan leaving school at that time, McDonald said. Afterward, Crumbley returned to class. Just before 1 p.m., he entered a bathroom wearing a backpack, then came out with the pistol in his hand and began shooting, authorities have said.
"When the news of the active shooter at Oxford High School had been made public, Jennifer Crumbley texted to her son at 1:22 p.m., 'Ethan, don't do it,' " McDonald said. Fifteen minutes later, James Crumbley called 911 to report that the gun was missing and that it may be his son who committed the school shooting.
"I have tremendous compassion and empathy for parents who have children who are struggling and at risk for whatever reason," McDonald said. "But the facts of this are so egregious."