Among the first couriers to bring them into San Diego was a woman named April Kelly. April was a heroin addict whose addiction began in 2004 with Vicodin prescribed to her after a C-section during the birth of her son. By 2017, she was experienced in going to Tijuana to bring back small amounts of heroin for her and her boyfriend. At the proposition of a trafficker, she moved to Tijuana and began crossing the bright blue pills, pressed in Mexico and containing only fentanyl.

