Darren Martyn, who the FBI claims is the hacker "pwnsauce," has as unassuming a background as Davis. Though listed in FBI filings as 25 years old, Mr. Martyn is a 19-year-old biopharmaceutical chemistry student at a university in the small city of Galway, Ireland. The Connacht Tribune reports that people who know Martyn "describe him as a quiet, shy, highly intelligent man who has always had an interest in computers."
According to the Irish Examiner, Martyn is the user of the Twitter account @info_dox, where he describes himself as a "security researcher," student, and "reformed blackhat." Blackhat is a term often used to describe a malicious hacker. The owner of the Info_dox account declined to comment on the charges when asked on Twitter by the Examiner's Conor Ryan, though he did indicate that he is Martyn and confirmed that he is not 25. No new tweets have been published on the Info_dox account since Tuesday.
The Connacht Tribune notes that Martyn was arrested and questioned last year by the Garda, Ireland's national police, but was released without charge. The Examiner reports that Martyn has not been arrested in connection with the FBI charges.