I may be understanding the laws wrong, but I believe that he wasn't prosecuted for copyright law because copyright law mainly deals with redistribution, not per

I may be understanding the laws wrong, but I believe that he wasn't prosecuted for copyright law because copyright law mainly deals with redistribution, not personal use. Even the DMCA in its worst interpretation only disallows circumventing DRM to make a copy for personal use; making a copy for personal use by itself has never been covered by copyright law. Since he wasn't planning to redistribute the code he copied, he wasn't affected by copyright law.