Our coke swabs—which turn blue when they detect the drug—picked up traces of coke in four of the nine locations we tested.
The driver is being held at a south London police station on suspicion of terrorist offenses.
A US senator claimed this week that Aamer was not transferred to the UK with the full agreement of the US government and military. Meanwhile, British officials said the US case had been "discredited."
A petition to ban the US presidential candidate from entering the UK because of his controversial comments about Muslims has gathered more than half a million signatures.
Though the UK's decision to launch airstrikes in Syria was hotly debated and met with protests, it's a largely symbolic move.
Aamer, long acknowledged to be a leader of detainees at the detention facility, was never charged with a crime during the 13 years he spent as a captive of the US government.