Temporary Detective Chief Superintendent Gordon Lang said he did not "anticipate any more arrests" in the double murder case.
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Junko Tabei, who conquered Everest in 1975 aged 35, passed away after battling cancer.
Whitmore said she is "absolutely devastated" that she will not be performing on Saturday's show because of an ankle injury.
Dillon, who was most famous for co-creating the critically-acclaimed 'Preacher' series, died in New York according to his brother.