The death of Indigenous man David Dungay Jr in Long Bay jail after a disagreement about a packet of biscuits raises questions about the use of medical restraint and tranquillisers. We follow the family as they search for answers

• Listen to the Breathless podcast here

• David Dungay Jr dies in custody, and his family are changed forever – photo essay

• ‘If you can talk, you can breathe’: the death in custody of David Dungay