This video from the USA is called The Post-9/11 Afghan Heroin Explosion.
From The Nation daily in Pakistan:
Reports link Karzai’s brother to heroin trade
When Afghan security forces found an enormous cache of heroin hidden beneath concrete blocks in a tractor-trailer outside Kandahar in 2004, the local Afghan commander quickly impounded the truck and notified his boss.
Before long, the commander, Habibullah Jan, received a telephone call from Ahmed Wali Karzai, the brother of President Hamid Karzai, asking him to release the vehicle and the drugs, Mr. Jan later told American investigators, according to notes from the debriefing obtained by The New York Times. He said he complied after getting a phone call from an aide to President Karzai directing him to release the truck.
Two years later, American and Afghan counternarcotics forces stopped another truck, this time near Kabul, finding more than 110 pounds of heroin. Soon after the seizure, US investigators told other American officials that they had discovered links between the drug shipment and a bodyguard believed to be an intermediary for Ahmed Wali Karzai, according to a participant in the briefing.
The assertions about the involvement of the president’s brother in the incidents were never investigated, according to American and Afghan officials, even though allegations that he has benefited from narcotics trafficking have circulated widely in Afghanistan.
See also here.