David McMillan is a British Australian former drug smuggler. He was arrested several times between the early '80s and 2012 for trafficking heroin through Southeast and Central Asia. He estimates he trafficked over $17 million worth of heroin internationally.

McMillan speaks to Insider about the process of heroin trafficking and smuggling routes leading to the US and Europe. Since leaving the heroin-smuggling trade, McMillan works as a public speaker. He is the author of "Escape" (2007) and "Unforgiving Destiny" (2017).

Find his books here: www.davidmcmillan.net