The family of Darren Croxton said they are pleased with the manslaughter conviction but disappointed that a second man was cleared.
They said in a statement released through Sussex Police: "Darren did not deserve this tragic ending to his young life, he leaves behind a child who has to grow up without her father. We are all devastated and feel that the huge whole left in our lives by his death will never be filled."
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Southern Health NHS Foundation Trust has appeared in court to enter a plea to the charge that it failed to provide safe care and treatment.
Thursday afternoon's weather for the east of the region
Thursday afternoon's weather for the west of the region