Jamie Meline, better known as El-P, is a household name thanks to his work with Killer Mike as Run The Jewels. But, once upon a time, deep in the grimey East Coast rap underground, El Producto changed everything. With his crew Company Flow, as producer on a string of influential classics, and as label head of Definitive Jux, he forged his own path, far from the mainstream, from his Brooklyn apartment. In part 1 of our El-P special, we look at his early collaborations, the forging of his solo career, and more.