Nazeri Zubair’s travelling companion crushed a pill, dissolved it in water, and fed it to her two-year-old daughter to make the baby sleep for over a day. It was a requirement of the smugglers who were guiding the group from Serbia across Croatia’s border then into Slovenia; opening up possibilities of travelling without passport checks within 26 countries on Europe’s mainland. Over 90% of undocumented immigrants who enter the EU illegally use people smugglers at one stage of their journey, according to Europol. Nazeri came into contact with dozens of smugglers while traversing 12 countries. Finding them was as easy as finding a regular travel agent, through recommendations or at notorious hot spots such as Victoria Square in Athens. One led him through a minefield, and another across treacherous Mediterranean waters. Nazeri said children aged under 4 were systematically spoon-fed sedatives to keep them quiet. Smugglers refuse to take young families who won't administer drugs.