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Rob Veale gave a talk on strangulation at a Community Corrections family harm forum in Dunedin yesterday.
It revolved around the seriousness of the crime and signs the act had occurred.
Strangulation was the ''ultimate'' display of fear and power. It was seen as so lethal it was now banned in the police force, he said.
''It's not an attack on the neck, it's an attack on the brain.''
From a police perspective it was important to get to such a scene within an hour as the victim would be more likely to speak about the incident.
The court system could minimise the offence, however there was a push in the country for law reform specifically targeting strangulation, he said.
The talk was one of many at the forum yesterday.
Community Corrections services manager Coyla Cameron said the day was meant to promote practice, education and understanding of family harm within the community.
Those attending were largely from government agencies and non-profit groups, she said.