A Midlands company has helped develop a gun which fires pellets filled with artificial DNA from a distance of up to 40 metres.
The bullets leave a unique tell-tale mark on the suspect which is only visible under ultraviolet light.
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The woman was arrested after police found the body of an elderly woman on Sunday (22 October).
Cloudy with outbreaks of rain across the region this morning but will brighten up in the afternoon, leading to sunny spells.
A cloudy, damp and breezy start to the day but will slowly brighten up as the day goes on.