Maria Stubbings, of Chelmsford in Essex, was strangled with a dog lead in 2008 by Marc Chivers, who had already killed a previous girlfriend.
Her brother Manuel Fernandez has told ITV Daybreak that the family have been calling for a public inquiry.
He said: "This highlights issues around domestic violence with one police force but it's actually a national problem."
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The programme, which has been in place since 2015, is being axed following feedback from customers.
The 64-year-old’s victory will bring in a new system transferring all executive powers to him.
Last week, the Government announced the NHS would receive an additional £20 billion a year in real terms funding by 2024.