The U.S. paid $50,000 in compensation for each villager killed and $11,000 for each person wounded in a shooting rampage allegedly carried out by a rogue American soldier in southern Afghanistan, Afghan officials said Sunday.

U.S. investigators believe the U.S. soldier accused of killing 17 Afghan civilians split the slaughter into two episodes, returning to his base after the first attack and later slipping away to kill again, two American officials said Saturday.

U.S. defense officials say the death toll in the massacre of Afghan villagers is now 17.

The Army inspector general is conducting a system-wide review of mental health facilities to determine whether psychiatrists overturned diagnoses of post-traumatic stress disorder to save money.

Facing a skeptical Congress, the top commander in Afghanistan insisted on Tuesday that the United States is winding down the decade-plus war and has no intention to remain in the country indefinitely.

Charges against an American soldier accused of killing 16 Afghan civilians are expected to be filed within a week, and Afghan investigators are not convinced that one soldier could have single-handedly carried out the massacre.

Mental health experts say the soldier suspected of killing Afghan civilians could have post-traumatic stress disorder, or PTSD.