Murderer William Beggs is suing the City of Edinburgh Council over claims it breached his rights under data protection laws.
Beggs, 55, has filed a string of complaints against prison chiefs and is now taking on the City Chambers with a hearing listed today.
He is serving at least 20 years in Saughton Prison for brutally murdering and dismembering a teenager in a case that shocked the country.
The 'Limbs in the Loch' killer was ordered to serve a minimum of 20 years in 2001 for the murder of Tesco worker Barry Wallace, 18, in Kilmarnock in 1999.
Parts of Barry's body were found in Ayrshire and Loch Lomond .
Beggs fled to the Netherlands but was extradited to face justice, and since being behind bars he has filed several actions against the Scottish Prison Service, before turning his attention to the local authority in Edinburgh.
His lawyers refused to discuss details, but he is believed to be accusing the council of failing to comply with his request to divulge what personal information of his they hold.
He will claim city chiefs contravened the Data Protection Act in a civil case that could cost the taxpayer thousands to defend.
The law controls how personal information is used by organisations, businesses or the government.
It means anyone responsible for using personal data has to follow strict rules called data protection principles.
They must make sure the information is used fairly, transparently and for explicit purposes.
Personal details must be kept for no longer than is necessary and handled securely.
A spokesman for the City of Edinburgh Council said: "The council does not comment on ongoing legal proceedings."
Ian Wallace, the father of Begg's victim, said his killer should die behind bars after it transpired he can apply for parole at the end of this year.
Last June, heartbroken Ian, 67, said: "Barry was 18, a good lad of him.
"Any parent who loses a child can never get over it and it's especially hard to know that the nature of your child's death was so brutal."
In January, Beggs launched a second bid for a laptop in his cell months after a top judge kicked out his previous.
He was knocked back again and filed an appeal at the Court of Session.
Beggs is understood to have filed several actions against the Scottish Prison Service and claimed he needed a computer behind bars.
Tory MSP Liam Kerr said at the time it was clear Beggs aimed to be a "nuisance" to the justice system and taxpayers.
Mr Kerr said: "These seem little more than the actions of an unrepentant and cynical individual."
In April, Beggs was reportedly scalded with boiling water in a vicious prison attack at Saughton.
Fellow inmate Graham Meikle, 53, is understood to have pounced after the killer made a jibe about a relative who died.
Beggs was also convicted of murdering Barry Oldham, 28, in 1987 and trying dismember his remains, which were found on North York Moor.
The conviction was quashed in 1989 by Appeal Court judges - on a technicality related to how his trial was handled by prosecutors.
