The six-year-old twins cling to their handcuffed nanny while their mother smiles quietly—but when their father checks the security footage, he uncovers a chilling secret about his wife

under the shade of the blooming jacaranda trees in Mexico Park, Mateo ran to Lupita and handed her a crayon drawing. On the crumpled paper were four people holding hands, all smiling under a giant sun.

“This is our family,” said little Mateo, pointing at the stick figures. “I know you’re going to go away to study, but you can live in your house and continue reading …