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Speaking after the decision, Grace's devastated father Dr Sanjoy Kumar told BBC News: 'Justice has not been done for our daughter and she would be disappointed.'
The engineering graduate stabbed Grace O'Malley Kumar, fellow University of Nottingham student Barnaby Webber - both 19 - and school caretaker Ian Coates, 65 last summer.
Grace O'Malley Kumar's brother has spoken out on his suffering following his beloved sister's death, as well as how she was a hero - something 'important for people to hear'.
Calocane killed Barnaby Webber, Grace O'Malley-Kumar and Ian Coates and attempted to kill three others
Calocane stabbed Grace, fellow University of Nottingham student Barnaby Webber - both 19 - and school caretaker Ian Coates, 65, in a horrific city-wide rampage on June 13 last year.