The government said it came to the conclusion that Xavier Justo tampered with the emails and documents relating to 1MDB based on "logical assumption".
Deputy Home Minister Wan Junaidi Tuanku Jaafar said this when asked about the investigation on PetroSaudi International's ex-director which followed claims made by a private company- Protection Group International (PGI).
"It's very simple, the person arrested was Xavier and the documents seems to be from him.
"So, we cannot assume anything else than he had tampered with the documents," he told a press conference at Putrajaya today.
However, Wan Junaidi said this is subject to the investigation conducted by the Thai authority.
"Everything we said here and do were based on logical assumption, on how the things could have happened," he noted.
Maybe documents will appear soon
Despite Thai police saying the arrest of Justo revolved around the Swiss citizen's alleged attempt to blackmail his former employer using the leaked information, Wan Junaidi said the Thai counterpart may later produce in court the tampered documents as evidence.
"Of course the investigating authority would not make any speculation in their newspapers. Perhaps (tampered documents) will be (known) when they bring (it) to the court later, but not before.
"That is to protect their credibility," replied Wan Junaidy, who is also the Santubong MP.
Wan Junaidi, however, did not reveal how Justo had tempered the document.
Home Minister Ahmad Zahid Hamidi has claimed that Justo tampered with emails allegedly stolen from his company, to paint debt-ridden 1MDB and PetroSaudi business partner in bad light.
“During interrogation, Justo mentioned the names of several Malaysians who supposedly asked (him) to manipulate facts from the information that was downloaded from PetroSaudi’s communication system," Zahid was quoted as telling reporters at an event in Malacca last Thursday.
Since Justo's arrest, Putrajaya has gone on a narrative that Justo had supplied tampered 1MDB documents to whistleblower website Sarawak Report and The Edge Media Group.
This implied that reports by the website and The Edge on the 1MDB controversy was therefore inaccurate.