A domestic violence action group says the police need to keep more data on the number of people murdered by their partners, to aid research and prevent violence.
Roundtable for Violence Against Women spokesperson Ruth Herbert says the police do not routinely collate information on the relationship between murderers and victims.
She estimates that more than 20 women have been killed by their partners or former partners since Sophie Elliott was murdered by her former boyfriend Clayton Weatherston last January, but there is no way of knowing exactly, because of the lack of statistics.
With better statistics, she says, more research could be done to prevent domestic violence.
