A day before four students were killed at a Michigan school, the mother of the teenager charged with carrying out the mass shooting sent him a text message asking if he had showed teachers a “pic of your new gun,” an investigator testified Tuesday. The text was one of several between Jennifer and Ethan Crumbley on Nov. 29 after school officials left a voicemail informing her that the 15-year-old was looking up ammunition on his phone. A judge must decide if there’s enough evidence to send Jennifer Crumbley and her husband, James Crumbley, to trial on involuntary manslaughter charges. It’s a low threshold under Michigan law, but this case is highly unusual because parents are rarely held criminally responsible for teens accused in mass school shootings.

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