Jobson had admitted manslaughter but denied murdering Ms Madgin
A teenage girl who stabbed a young mother to death after bingeing on alcohol and cocaine has been sentenced to life in jail.
Jordan Jobson, 15, repeatedly slashed Samantha Madgin when two groups of youngsters clashed in an alley in Wallsend, North Tyneside, last August.
Ms Madgin, 18, had given birth to her son Callum just 10 weeks earlier.
Jobson, who drank lager, vodka and took lines of cocaine before the attack, was given a minimum term of 15 years.
She had admitted manslaughter but was found guilty of murder at Newcastle Crown Court on 3 March.
The teenager, of Holywell Avenue, Walker, told the jury she had armed herself with a kitchen knife and went outside to pull friends away from the argument, but did not intend to hurt or kill Ms Madgin.
However, the prosecution claimed it was the young mother who tried to stop the argument.
Ms Madgin, who gave birth to son Callum in May, suffered 10 stab wounds - one to her face, six to her arms and three to her chest.
Samantha Madgin gave birth to her son Callum in May last year
Her mother Alison Madgin said: "All because of the evil that was on the streets that fatal night, Samantha will never enjoy any of those special moments a mother is privileged to have.
"As a mother myself, I long to hear Samantha's voice, smell her, kiss her, feel her, hug her hard.
"I cannot get my head around how a so-called human being could take that away and have no remorse."
Jobson drank six cans of lager, three pints of vodka and cola and took up to eight lines of cocaine before the attack.
In sentencing, Judge David Hodson warned of the dangers of combining alcohol and drugs.
Four men admitted affray charges in relation to the fracas and a woman admitted assisting an offender.
They received sentences ranging from community orders to 18 months imprisonment.
Det Ch Insp Mick Paterson, who led the Northumbria Police investigation, said: "These sentences reflect the severity of the case.
"However, no amount of custody can ever bring Samantha back and our thoughts remain with her family at this time.
"I would echo the comments of the judge of the danger of mixing alcohol and drugs. When this is combined with carrying a knife it can have lethal consequences."