A MOVEMENT has formed to `seek the truth' behind the murder of three-year-old Petar Terziiski - although the boy's mother has confessed to it.

Petar - the son of a taxi driver - was strangled and his body was thrown in a lake in Sofia's South Park on March 16. At first it was believed he had been abducted - and the news sparked an anti-government protest by taxi drivers.

Daniela Terziiska admitted killing her son that same evening - after hours of questioning - but since then the Bulgarian press has been flooded with rumours and theories.

The members of the new movement met on a web forum on the site of the daily newspaper Monitor. On Monday they met in person and decided to found the movement - The Truth About Pepi.

Founder Mariana Marinova-Kasabova said on Tuesday: "There is an information black-out on the case. There are things that do not fit well in the official version.

"We have no political agenda, nor do we want to prove Daniela guilty or not guilty of her child's murder - all we want is the truth about the child's murder."

On March 28, the daily newspaper Monitor published stills from a recording made by the security cameras of the PRIMA Business Centre (at the junction of Tsar Boris III Boulevard and Sofiiski Geroi Street). The recording allegedly shows Daniela Terziiska, at around 8am on the day of the murder, walking along the boulevard, carrying her son, who is alive.

Police seized the PRIMA tape with the notorious recording to examine its authenticity the same day. According to the official police version, the boy was already dead at that time.

On Saturday, the daily newspaper Novinar stated "The tape of Daniela is authentic." The Interior Ministry press centre announced the same day that the ministry's Scientific Criminology Institute had finished examining the recording. No results were to be revealed to the public as they formed part of the investigation.

Mariana Marinova-Kasabova said: "People are afraid, but I am not - although I have been receiving threats, by email and to my GSM. We are not preparing a conspiracy, or a coup d'etat - we just want the truth.

"We will try to attract witnesses who have not reported to the police yet, and we will guarantee their anonymity; we will write to international organisations like Amnesty International. We already have bank accounts, and about 10 Bulgarians living abroad have declared they'd support us financially."

The movement's first official meeting was due to take place yesterday.

Daniela Terziiska is being examined at the Forensic Psychiatric and Psychological Clinic in Sofia, according to a ruling of the Sofia City Court on March 19.