A serial sexual predator turned vicious rapist was first identified as a danger to women five years ago.
He admitted following a young woman, then dragged her into bushes and raping her, in the early hours of December 1.
It is believed Jamieson, of Hampstead Road, Kensington, had followed her from Lime Street for about 15 minutes before setting on the victim.
The warning signs were there years beforehand due to Jamieson’s history of sexually assaulting lone females in public.
However, despite a top judge expressing “grave concerns” about him targeting more women, the young pervert wasn’t stopped.
Jamieson, originally from Everton, has been breaking the law since he was teenage boy “drinking vast amounts and taking cocaine and cannabis”.
Defence lawyers have previously outlined how he had issues growing up, which led to serious “behavioural problems”.
He witnessed domestic violence between his parents, went in council care at 15 and left school with no formal qualifications.
By the age of 17 he had convictions for theft from a home, criminal damage, common assault and cannabis possession.
Yet it wasn’t until January 2015, having now turned 18, that he first revealed how much of a threat he posed to women.
She was listening to music on headphones when he approached her, put his hand up her skirt and groped her.
After police caught him nearby, the teen asked officers: “Why am I being arrested? I haven’t done anything.”
Jamieson claimed he had been visiting his girlfriend at the time of the attack, but later admitted sexual assault.
His barrister said he was “remorseful and ashamed” and couldn’t come to terms with what he had done and why.
Worryingly, Judge Brian Lewis said: “You don’t really seem to have any understanding of just how horrifying it was.
“Your interview with the probation officer was a catalogue of minimisation of what you had done.”
Jamieson was jailed for nine months and told to sign on the Sex Offenders Register for 10 years.
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Judge Lewis was right to question the teenager’s understanding of what he had done to his terrified victim.
Because when released from prison and still on licence he struck again – molesting two students in Liverpool city centre.
Jamieson groped a 23-year-old woman who was making her way home along Trueman Street that October.
He grabbed her in a “bear hug”, squeezed her bottom “extremely hard”, then fled, at around 9.30pm.
Nine days later, he molested an 18-year-old woman who was walking along Churchill Way, at around 8.20pm.
He ran over and apologised for scaring her, but then grabbed her bottom and put his hand between her legs.
A pattern had set in and defence lawyers conceded Jamieson had acted in a planned and “predatory” fashion.
Judge Denis Watson, QC, said being on licence seemed to have “no real impact in terms of any deterrence”.
He concluded Jamieson “stalked” his victims after selecting them as targets and the attacks were “extremely sinister”.
The judge said he had “grave concerns” about him targeting more women, but couldn’t pass an extended sentence.
That was down to the law, which because it was a non-penetrative sexual assault, didn’t permit the judge to do so.
It meant Judge Watson couldn’t conclude he was “dangerous” – as defined in law – and order him to serve even more time behind bars.
With his hands tied, the judge jailed the sex fiend for 26 months, in December that year.
In May 2018, Jamieson got into an argument with another young man, outside Lobster Pot in Whitechapel.
The other man’s nan, in her early 60s, stepped in between the pair, but was pushed by Jamieson and fell.
She hit her head on the pavement – suffering a bleed on the brain – before her cowardly attacker ran away.
On the opening day of a trial last June, he pleaded guilty to recklessly inflicting grievous bodily harm to the victim.
Defence lawyers argued she inserted herself in the row and the push was without malice, in the heat of the moment.
They said Jamieson had little in the way of violence on his record and had been doing well since his last offence.
Judge Rachel Smith agreed to spare him jail and imposed a 16-month prison sentence, suspended for 18 months.
While subject to that suspended sentence – which Jamieson has admitted breaching – he raped his latest victim.
It will now fall on Judge Robert Trevor-Jones to sentence Jamieson, and decide whether he is “dangerous”, on February 28.
In all likelihood he will impose an extended sentence in double figures, of which Jamieson will serve at least two thirds behind bars, keeping him locked up until he’s in his 30s.
But for the women whose lives he has already ruined, it will be too little, too late.