Who's to say he didn't buy it some place else and pass it on? Maybe that's part of the reason he killed himself.
Al Qaeda Prepared 50 Terrorist Kamikazes for Attacks in Turkey
4 October 2005
Ankara. International terrorist network Al Qaeda is planning terrorist attacks in Turkey during the holy Muslim month of Ramadan, which starts on October 5, RIA Novosti reported today. Al Qaeda has trained 50 women kamikazes in the country, Turkish political Tempo Daily reads today.
According to information from the so-called Al Qaeda commander in Turkey, Omer bin Abulwedud, during the holy month Osama Bin Laden will arrive in Iraq to personally lead the war against the occupiers. The newspaper reads that a large number of Turkish citizens will also arrive in Iraq.
Turkey is the most complex country for Al Qaeda’s activity, Sedat Laciner, President of International Strategic Research Organization (ISRO/USAK), said, adding that Al Qaeda uses Syrian citizens for the execution of terrorist attacks in Turkey.
http://www.focus-fen.net/index.php?catid=127&ch=0&newsid=73624
I just wondered while reading that story why the store owner didn't report him for wanting to buy the ammonium nitrate "without a good reason" in his words.