http://www.guardian.co.uk/commentisfree/2013/jan/09/japanese-cat-clues-internet-prankster-hackershttp://www.smh.com.au/technology/technology-news/cat-collar-clue-in-japanese-hacking-case-20130108-2cdo1.html
They may have actually caught him this time!
http://www.japantoday.com/category/crime/view/tokyo-man-arrested-over-mass-killing-online-threat