By Rob Kuznia and Lena H. Sun
LOS ANGELES — Doorways chained shut and “Members Only” signs warn casual passersby against stopping along this five-block stretch of downtown known as the “Cannabis District.” This gritty corridor is a major hub for the estimated $9 billion black market for the state’s illicit cannabis products.
Products sold here, including a flood of counterfeit vape materials from China, are coming under scrutiny as federal authorities investigate the mysterious vaping-related lung illness that has sickened at least 530 people in 38 states and claimed nine lives.