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.
The IPCC has undertaken a thorough assessment of the information contained within the referral made by Sussex Police following the conviction of Robert Trigg."
“We have determined that the referral does not meet the criteria for IPCC involvement, as there have been no conduct or complaint matters identified in the referral that could allow us to determine that an independent, managed or local investigation is or is not required."
“We have requested that should any new complaint or conduct matter come to light during Sussex Police’s internal reviews, that this be referred to us.”
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