Former Bulgarian ruling party GERB vice-chair and election campaign manager Tsvetan Tsvetanov vowed victory on the May 12 vote at party rally in Blagoevgrad Tuesday evening.

At the meeting, Tsvetanov reaffirmed his strong belief that anti-mafia police head Stanimir Florov, currently charged for corruption, is blameless and a top professional.

Tuesday the former Bulgarian Minister of Interior spent almost the entire day testifying to the prosection on Florov's case, as well as on a separate case relating to alleged rampant illicit police wiretapping while he was minister.

"Those cases are political fabrications of the Bulgairan Socialist Party and its leader Sergey Stanishev," stated Tsvetanov, drawing attention to the fact that the signals for both investigations came just ahead of the elections campaign.

The GERB strongman further suggested that the prosecution had acted out all took quickly in announcing results from the investigations, instead of waiting until after the elections.

"You will see that after May 12, those cases will just wither away," said Tsveatnov.

He also repeated his description of socialist leader Stanishev, who also chairs the Party of European Socialists, as "a mouthpiece for organized crime in Bulgaria."

GERB leader and former Bulgarian PM Boyko Borisov spoke at the rally ahead of Tsvetanov, reiterating his full support for his aide and dubbing him "GERB's flagship."

According to Borisov, his 2009-13 cabinet had done "more for Bulgaria than what was done by cabinets in the 20 years before."

The GERB leader assured that his party is the only one in Bulgaria that has currently the resources and know-how to implement a stable and effective rule after the May vote.