Slain in Their Sleep, Afghan Police Betrayed By Their Own The fear of insider attacks has been an even bigger concern for Afghan security forces than it has been for NATO and American forces, The Times's Rod Nordland wrote on Friday. The toll has been even heavier for the Afghans themselves - at least 86 in a count by The New York Times this year, and the full toll is likely to be higher - than it has for American and other NATO forces, who have lost at least 62 so far, the latest in Kabul on Monday. Mr. Nordland reported that in the past 10 days, "a wave of betrayal" has cost the lives of at least 17 Afghan police officers. These "green on green" attacks between Afghans have been clear cases of either infiltration by Taliban insurgents or turncoat attacks. A rundown of the most recent insider killings: Dec. 27 - An Afghan policeman unlocked the door of the check post where he was stationed in Oruzgan Province and let in his friends from the Taliban, who with knives and guns helped him kill four of his sleeping colleagues and wound eight. Dec. 24 - A police sergeant shot and killed an American civilian adviser at police headquarters in Kabul. She became responsible for this year's 62nd "green-on-blue" insider attack and one of the strangest of them all. Dec. 23 - A local police commander in the remote northern province of Jawzjan personally shot to death, in their beds, five of the men under his command, and fled to join the Taliban. Dec. 18 - A teenager apparently being kept for sexual purposes by an Afghan Border Police commander in southern Kandahar Province drugged the commander and the other 10 policemen at the post to put them to sleep, and then he shot them all; eight died and three survived with wounds.