One Direction
He was reportedly 'trashing' his hotel room when staff called emergency services.
He announced his departure in 2015, a year before the boyband went on hiatus.
He died at the CasaSur Palmero Hotel in Argentina on October 16.
ABC Nightline's Juju Chang investigates.
Look back at his complicated history with substances.
The singer's last words shed light on his mental state before his passing.
You probably know which member had the most successful solo career.
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