A Sydney mother died after drinking 67 cups of water under 24-hour watch 

But sometimes she would still hear voices, or see people who weren't there.Two weeks before the detectives knocked on Vicki's door, Tammy felt herself sliding into a crisis And that little girl would run to the front door every time she heard the gate creak open, calling out for nan, a nan who never came home.Tammy died alone, 11 days after she had walked into a police station and asked to be kept safe, inside a prison unit named after a proud Wiradjuri woman who spent her life trying to make jail a more merciful place.This is Tammy's story.Images and recordings depicting Tammy Shipley have been used with the permission from her family.The coronial inquest into her death is ongoing before State Coroner Teresa O'Sullivan.Background Briefing sought comment from Corrective Services NSW, as well as the Justice Health and Forensic Mental Health Network