An FBI official says a two-year-long multinational investigation led them to nab a 23-year-old Slovenian, who allegedly created a malicious software code that infected 12 million computers worldwide, according to AP. Stephen Gaudin, a legal attache of the FBI to the U.S. embassy in Vienna, Austria, told reporters Friday that the cooperation between the FBI, Slovenian and Spanish forces was «unparalleled.» Slovenian police detained and questioned the man, identified only by his code name Iserdo, ten days ago. He is suspected of selling the malware to the operators of the Spanish Mariposa botnet _ a network of infected computers _ which stole credit cards and online banking credentials. Toni Kastelic, the head of Slovenian police cyber crime department, says police also questioned another, 24-year-old person, and confiscated 75 computers in seven house searches.