Article 11

1. If goment or anybodi say person do bad, and dem come carry am go court, nobodi fit talk say dat person do bad until say dem judge well well so tay mago mago no de, na dat time dem fit talk say di person na really bad person and e do ting we make dem becos of am bring am come court. Di person must to get people wey go defend am before dem fit talk say e do di bad ting wey dem say e do.
2. Dem come talk again say nobodi fit talk say person do bad ting if di ting no really bad, weda for di law of im kontri or for di whole world, for dat time wen e do am. Again na di punishment wey e fit di bad ting wey di person do for dat time if e do am, naim dem must to give am, no be di one wey e heavy pass di offence wey e do, for di time.

http://www.ohchr.org/EN/UDHR/Pages/Language.aspx?LangID=pcm

I think General Buhari violated someone's human right by hanging him for an offence which did not have a capital purnishment as at the time it was commited. This is really sad and now I see General Buhari, with all due respect, as an evil person who should be purnished for the sins he did in the past.