It was almost dark when Almar Habibzai, clad in his blue-gray police uniform, returned from work Oct. 15 and pulled into the driveway of his family’s house in east Kabul.
As the 22-year-old sergeant stepped out of his Toyota Corolla, he did not notice the two men who had followed him up the narrow dirt road on a motorcycle.
When Habibzai’s father heard gunfire, he raced out of the house barefoot. His lanky, mop-haired son had been shot three times in the back and was splayed on the ground, oozing blood.
The killers had already disappeared over the hill on their motorcycle.
Habibzai was a member of the Major Crimes Task Force, or MCTF, an Afghan police agency that...