Sasha - full name Chanelle Sasha Jones - was found in a Ford Fiesta stopped by police between Aberaeron and Aberarth in Ceredigion.
A post-mortem revealed the childcare student had died from stab injuries.
It includes victims of domestic violence and straightforward assault as well as gang-related deaths.
Many cases are still being investigated or prosecuted by police but where there has been a conviction, this is noted in the text and the story is linked.
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