Detective Superintendent Steve Brown of the Jamaican police has said he believes the shooting that resulted in the death of Imani Green was "targeted" but that she was not the target.
He said that police are still pursuing a number of leads but that they do not suspect gang involvement.
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Cyprus Police said two people are facing charges of premeditated murder.
The figure is up from £42.3 million in 2014/15 and £56.9 million 2015/16, according to the research.
A study by Which? looked at the work done by councils across the country.