Heber's book and the name of his weight-loss plan promote the company's signature product.

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As the school went into lockdown amid the shooting, Heber's wife texted him from her office, reminding him to lock his classroom door.

CNN: Teacher talks armed student into giving up, police say

When David Heber appeared recently on ABC's Good Morning, America, viewers believed the noted nutritionist was pitching his new book, The L.A. Shape Diet.

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