Connor Tremble's mother read a statement on behalf of her family and a poem dedicated to her murdered son.
Lisa Tremble said how they would never share another birthday or Christmas again but had finally got justice for her son.
She was speaking after Will Blencowe was found guilty of murdering 17-year-old Connor after fatally stabbing him at a house in Fairacres Road, Oxford, on February 13.
DCI Mark Glover also spoke of the conviction.
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Our top stories
UPDATE: Police in riot gear head into Oxford University Parks in hunt for Jed Allen over triple murder in Didcot + new video
8:11am Sunday 24th May 2015
POLICE are today hunting for a 21-year-old man called Jed Allen following the murder of three people in Didcot.
10:39am Sunday 24th May 2015
INFANTRYMEN of The Rifles regiment are marching through Oxford this morning for the first time.
9:30am Saturday 23rd May 2015
Former Oxford United captain Mike Ford is relishing a return to management with Banbury United, after spending more than a year out of the game.
8:29am Friday 22nd May 2015
A HOUSE fire that forced people to jump for their lives was started by a businessman who accused his best man of having an affair with his wife, a jury heard.
3:16pm Friday 22nd May 2015
A WOMAN who went missing from Banbury has been found, police said
3:24pm Friday 22nd May 2015
TRAINS from Oxford could be disrupted after a person was hit by a train between Slough and Reading.