Young offender Michaella McCollum, who became infamous worldwide as one half of the Peru Two, offers her account of how she came to be arrested, tried and jailed in one of the most notorious maximum security prisons in Peru. She recounts how she and fellow would-be mule Melissa Reid were tasked with pretending to be tourists at Machu Picchu, before walking 12kg of cocaine into Jorge Chávez International Airport in August 2013