Sussex Police says it's commissioned three reviews into way it handled the case of killer Robert Trigg.
The 52 year old is beginning a life sentence for the murder of one of his former partners and the manslaughter of another.
Trigg was convicted only after the family of Susan Nicholson launched their own investigation.
They say they want a truly independent review of what went wrong, as Malcolm Shaw reports.
Sussex Police are to conduct three reviews into their handling of the deaths of two women in West Sussex.
Robert Trigg was convicted last week for the murder of Susan Nicholson in 2011 and the manslaughter of Caroline Devlin in 2006.
At the time the force found neither of the deaths to be suspicious, despite one of the victim's families campaigning for Sussex Police to reinvestigate their daughter's death. The force says it will publish key findings from the reviews.
52 year old Trigg was sentenced to life with a minimum term of 25 years.