LESLIE AGANS WAS desperate. Her teenage son, Michael, had once been a good student and terrific ice hockey player in Bucks County, Pennsylvania. But he’d become a deceitful, unmotivated, unpredictable and sometimes violent adolescent whose life was imploding thanks to his daily marijuana use. (U.S. News is identifying Agans by her maiden name and her son by his middle name to protect the family’s privacy.)

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