In 1991, Oktar was arrested for possession of cocaine, which he claimed had been planted in one of the books in his library by the security forces, who, he said, also spiked his food with cocaine.
Oktar membela diri dengan mengatakan bahwa kokain tersebut dimasukkan ke dalam buku-buku di perpustakaannya oleh petugas keamanan, yang juga mengisi makanannya dengan kokain.