Ian Dollery has been described as kind and compassionate, his widow and children say they miss him every second of ever day.
He was killed by Robert Kay, who has schizophrenia.
Mr Dollery's family say chances to diagnose his illness were missed time and time again.
Elaine Willcox reports:
Tony and Lucy also spoke to Julian Hendy whose father was stabbed by a man with a history of mental issues.
He's set up a website, Hundred Families, offering support and information:
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