When police officer Kristian White tasered 95 year old Clare Nowland in an aged care facility last year, he said the great grandmother was a threat because she was carrying a knife. 

But a jury has found him guilty of manslaughter.

Today, we speak with reporter Jason Om who has been covering the case and with criminologist Xanthe Mallett about how police use tasers. 

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Jason Om, 7.30 reporter

Xanthe Mallett, associate professor of criminology from the University of Newcastle