The guy who gunned down the brother of Afghan president Hamid Karzai is almost a metaphor for what's never going to let us 'fix' Afghanistan.
Two days ago, Ahmed Karzai was assassinated in his home by a trusted guard, Sardar Mohammad. So who was Sardar Mohammad, how did he get close to Karzai and why did he turn Talib assassin?
The man who assassinated the half-brother of the Afghan President, Hamid Karzai, spent years as an ally of the US in the war against the Taliban.
The killer, Sardar Mohammad, a police commander, met US and British military officials several times, shared intelligence with Americans and played a role in Afghan arrests of scores of Taliban fighters, say three relatives interviewed in his home near Kandahar.
The reasons behind the 35-year-old officer's dramatic switch against Ahmed Wali Karzai, perhaps the most powerful figure in southern Afghanistan, are still not known.