A man accused of murdering New Zealand teenager Emily Longley was remorseless, controlling and possessive, the prosecution in his trial in Britain has told the jury.
Emily, 17, was found dead in Elliot Turner's bed at his family home in Dorset in May last year.
Turner, 20, has denied murdering his girlfriend by strangling her in a jealous rage, saying he had defended himself during a fight.
His parents, Anita and Leigh Turner, have denied charges of perverting the course of justice, a charge Turner initially also pleaded not guilty to, but earlier this week admitted.
In summing up the prosecution's case, overnight, Timothy Mousley QC told Winchester Crown Court Emily probably stood no chance against Turner, the Bournemouth Echo reported.
"We submit he's remorseless, he's controlling, he's possessive and he's vicious and he murdered her,'' he said.
Turner manipulated his parents and told his mother to change her story, the court was told.
"It is clear Elliot pulled the strings.''
In summing up the defence case, Anthony Donne QC said Turner was "brash, flash, boastful, volatile, obsessive, possessive and obsessed'' but that did not prove he was a murderer, and he acted in self defence.
There was plenty of evidence before the court that Emily was capable of striking back, he said.
Turner was arrested following Emily's death on May 7 last year but was then released on bail.
Emily was born in Britain but her family moved to New Zealand when she was nine and she was raised in Auckland, where she attended Hauraki School, Westlake Girls' High and Takapuna Grammar.
She had returned to study in Britain and lived with her grandparents in Bournemouth while continuing her studies there.
Photo: Emily Longley (supplied)