A teenage boy has been jailed for a minimum of 16 years for the murder of a young mother during an argument over drug money.
The 16-year-old was sentenced to life for stabbing Paige Gibson, 23, in Halifax on 7 June.
Bradford Crown Court heard statements from Ms Gibson's family who told of their devastation and loss.
The mother-of-three had agreed sell a tablet and phone for her killer so that he and his friend could buy drugs.
Judge Jonathan Durham Hall QC told the boy: "She did not deserve to end her life stabbed to death through the heart in that shabby lonely corridor just because you, an angry, unpleasant young man, were upset, enraged and full of resentment about the drugs you did not get."
He said he sentenced the teenager, who cannot be named for legal reasons, on the basis he intended to cause Ms Gibson serious harm rather than to kill her.
Shortly before the murder the boy was heard to say "I need a knife. I'm gonna stab" her, the court heard.
The jury was shown CCTV footage of the stabbing, which tool place outside the flat Ms Gibson shared with her partner at Weavers Brook in Cumberland Close.
Ms Gibson died from her injury despite efforts to save her.
The teenager denied murder claiming he had armed himself with a knife because was trying to protect Ms Gibson from a violent boyfriend.
In a victim impact statement, Ms Gibson's mother Joanne said the teenager had shown no remorse for what he had done and had tried to blame others.
"He does not appreciate the devastation he has caused our family," she said. "This tragedy has ripped out my heart and soul. I feel so empty, so hurt and so, so sad."