"He is a good boy," Cheong Kah Pin whispers, "but they took him away." He scrunches up his tear-streaked face, uses the back of his hand to rub his eyes. His anguish is palpable. "Please help. Please." Cheong is living a parent's worst nightmare. His 28-year-old son, Chun Yin, sits on death row in Singapore, convicted in 2010 of smuggling 2.7 kg of heroin into the country. It's a harsh punishment for a first offender. But under Singapore's laws, judges have little choice but to impose a mandatory death penalty. Anyone caught with more than 15g of heroin is presumed to be trafficking, and once found guilty, will almost certainly be hanged.