Former Lord Advocate Elish Angiolini is seeking a non-harassment order against a man who claims she covered up an "establishment paedophile ring".
Dame Elish sought court protection against Robert Green, a self-styled "investigator" jailed earlier this year for naming prominent Scots as child rapists.
She is using laws she championed for the victims of harassment and aims to bar Green from approaching or contacting her in any way.
Her action is the latest result of a series of unsubstantiated child sex abuse allegations made by Hollie Greig, a young Aberdeen women with Down's Syndrome, more than a decade ago.
Dame Elish is understood to hope a non-harassment order would prevent Green, who acts as Ms Greig's "lay legal adviser", using the internet to claim she covered up for a paedophile ring said to include a sheriff, a senior police officer and other prominent Aberdonians.
The former Lord Advocate's solicitor, Peter Watson of Levy & McRae, last night said: "We are seeking an order to prevent Mr Green doing anything which would amount to harassment."
Dame Elish, the prinicipal of St Hughes College, Oxford, is taking the action amid heightened concern about the behaviour of "online trolls" and cyberbullies – those who use the internet to defame or intimidate others.
Her name has been widely linked on the internet to Green and Ms Greig's claims, despite two police investigations failing to find evidence of wrongdoing.
Dame Elish and others are said to be deeply hurt by an online campaign, partly linked to Green, that have made the Hollie Greig conspiracy theory an international internet sensation.
Campaigners who call themselves "Hollie's Army" have bombarded the Crown Office, the Scottish Government and MSPs with calls and emails complaining about Dame Elish.
Some websites have previously named those Green and others believe were victims of the supposed Aberdeen paedophile ring – as well as those they believe were abusers.
Websites have also claimed that Ms Greig's uncle – who died in a car crash in 1997 – was murdered after he witnessed her abuse and that her mother was "forcibly" sectioned days after the first allegations were made.
Green was released last month after serving three months of a year-long sentence.
The former travel agent, who is 65 and from Warrington in Cheshire, was jailed after what he believes to be the most expensive breach of the peace trial in Scottish legal history.
He was convicted of breaching the peace by naming members of the supposed paedophile ring and of breaching bail conditions barring him from travelling to the north-east of Scotland.
Last night Green, who is electronically tagged under the terms of his early release, said he would contest the non-harassment order.
He said: "If I don't get legal aid I will represent myself if Dame Elish is prepared to do so too. I would love to go up against her in court even though she is much more qualified than I am."
Green denies claims by Dame Elish's lawyers that he has taken pictures of the former Lord Advocate's home.
He also says he does not know who runs a website called "Free Robert Green" which repeats some of the unsubstantiated allegations against Dame Elish.
Green is barred from approaching witnesses from his trial by a series of non-harassment orders granted by the sheriff overseeing the case.
However, Dame Elish did not give evidence and has now turned to the civil courts to obtain protection. Green faces criminal sanctions if he breaches any non-harassment order granted by the courts.
The "investigator", who always stresses Ms Greig received criminal injury compensation as a probable victim of sexual abuse, committed his breach of the peace while campaigning in the 2010 Westminster elections.
He is thought to be the only candidate to ever run in a constituency – Aberdeen South – which he was legally barred from entering. Green stood for a party called Scotland Against Crooked Lawyers.
The "Hollie" case split the party, which subsequently disbanded.
Why are you making commenting on The Herald only available to subscribers?
It should have been a safe space for informed debate, somewhere for readers to discuss issues around the biggest stories of the day, but all too often the below the line comments on most websites have become bogged down by off-topic discussions and abuse.
heraldscotland.com is tackling this problem by allowing only subscribers to comment.
We are doing this to improve the experience for our loyal readers and we believe it will reduce the ability of trolls and troublemakers, who occasionally find their way onto our site, to abuse our journalists and readers. We also hope it will help the comments section fulfil its promise as a part of Scotland's conversation with itself.
We are lucky at The Herald. We are read by an informed, educated readership who can add their knowledge and insights to our stories.
That is invaluable.
We are making the subscriber-only change to support our valued readers, who tell us they don't want the site cluttered up with irrelevant comments, untruths and abuse.
In the past, the journalist’s job was to collect and distribute information to the audience. Technology means that readers can shape a discussion. We look forward to hearing from you on heraldscotland.com
Comments & Moderation
Readers’ comments: You are personally liable for the content of any comments you upload to this website, so please act responsibly. We do not pre-moderate or monitor readers’ comments appearing on our websites, but we do post-moderate in response to complaints we receive or otherwise when a potential problem comes to our attention. You can make a complaint by using the ‘report this post’ link . We may then apply our discretion under the user terms to amend or delete comments.
Post moderation is undertaken full-time 9am-6pm on weekdays, and on a part-time basis outwith those hours.
Read the rules hereComments are closed on this article