5.  The applicant was born in 1959 and lives in Vienna. 6.  The applicant is a practising lawyer by profession. He runs his law office with a partner. 7.  In 2005 criminal proceedings on suspicion of aggravated theft, aggravated fraud and embezzlement were opened against the applicant and a number of other persons by the Vienna Regional Criminal Court (Landesgericht für Strafsachen). 8.  On 21 February 2006 the investigating judge issued a search warrant for the applicant’s premises. The warrant authorised the search and seizure of the following items:
“Documents, personal computers and discs, savings books, bank documents, deeds of gift and wills in favour of Dr Heinz Robathin, and any files concerning R. [name of one person] and G. [name of another person].” 9.  In its reasoning, the search warrant stated that the applicant was suspected firstly of having taken furniture, pictures and silver worth more than 50,000 euros (EUR) from Mr R. in December 2003 for personal enrichment; secondly, of having induced Mr G. to sign an agreement for a secured loan of EUR 150,000 in December 2004, which Mr G. then failed to receive; and thirdly, of having abused the power of attorney granted to him by Mr R. in order to make bank transfers, causing the latter financial damage of more than EUR 50,000 in September 2003. 10.  The search of the applicant’s business premises was carried out by police officers of the Federal Ministry of the Interior on 21 February 2006. The applicant, his defence counsel and a representative of the Vienna Bar Association were present. The police officers proceeded to search the applicant’s computer system, copying all files to disc. The representative of the Vienna Bar Association opposed this as being disproportionate since it was technically possible, by using appropriate search criteria, to search for and copy only those files which corresponded to the criteria set out in the search warrant. Having contacted the investigating judge, the police officers insisted on copying all files. On the proposal of the representative of the Vienna Bar Association, the police officers copied all data returned by a search for the names “R.” and “G.” to one disc and all other data to separate discs. All the discs were sealed. 11.  The report drawn up by the police officers lists the following seized items: (1) laptop, (2) CDs/DVDs of R./G. data, (3) CDs/DVDs of all Robathin law office data, and (4) copies of agendas. 12.  All these items were handed over to the investigating judge. Because the applicant opposed the search of the data, the Review Chamber (Ratskammer), a panel of three judges, of the Vienna Regional Criminal Court was called upon to decide whether they were to be examined or returned pursuant to Article 145 § 2 of the Code of Criminal Procedure (Strafprozeßordnung). 13.  On 3 March 2006 the Review Chamber authorised the examination of all the files. It repeated that there were grounds for suspecting the applicant of the offences described in the search warrant and noted that the data in issue had been seized in the context of the preliminary investigations in respect of the applicant and other persons. A lawyer could not rely on his duty of professional secrecy and the attendant guarantees of Article 152 § 1 of the Code of Criminal Procedure when he himself was the suspect. In sum, the examination of the seized files was necessary in order to investigate the offences. 14.  On 23 March 2006 the Vienna Bar Association contacted the Procurator General, suggesting that he lodge a plea of nullity for the preservation of the law (Nichtigkeitsbeschwerde zur Wahrung des Gesetzes) in the applicant’s case. It submitted, in particular, that a search of a lawyer’s business premises risked impinging on his duty of professional secrecy. 15.  Pursuant to Article 139 of the Code of Criminal Procedure, the investigating judge had to give reasons when issuing a search warrant and to describe as clearly as possible which items were to be searched for and seized. In the applicant’s case it was open to doubt whether the search warrant had accurately described which items could be seized. Generally, only a search for particular files likely to be related to the offence in issue could be authorised. The same applied to searches of electronic data. A practising lawyer was obliged by law to have at his disposal a computer system fulfilling certain standards in order to communicate electronically with the courts. In fact, most lawyers also had all their files in electronic form. Standard software for law offices allowed full-text searches for any name or word and thus made it easy to narrow the search of data. In the present case such a search had returned results and thus the search warrant did not extend to the seizure of all of the law office’s data. 16.  For these reasons, the Bar Association argued that the seizure of all the data and the Review Chamber’s decision to permit the examination thereof had been excessive and therefore unlawful. The Review Chamber had failed to give any specific reasons why an examination of the data relating to Mr R. and Mr G. would not be sufficient. The applicant’s duty of professional secrecy could only be lifted in relation to the suspicion against him concerning two of his clients but not in respect of all his lawyer-client relationships. Moreover, the partner in his law office was not under any suspicion. 17.  By a letter of 12 April 2006 the Procurator General informed the Vienna Bar Association that he had not found any reason to lodge a plea of nullity for the preservation of the law. 18.  On 14 May 2009 the Vienna Regional Criminal Court convicted the applicant of embezzlement but acquitted him of the other charges. The court sentenced him to three years’ imprisonment, two of which were suspended on probation. On 22 December 2009 the Supreme Court dismissed the applicant’s and the public prosecutor’s pleas of nullity and on 10 March 2010 the Vienna Court of Appeal upheld the sentence. Subsequently, the applicant obtained evidence which had not been available to him at the time of the trial. He requested a reopening of the proceedings, which was granted and led to the applicant’s acquittal by the Vienna Regional Criminal Court’s judgment of 15 March 2011.