For three days Yusef Casanova hunted for methamphetamine and a gun. On June 4, 2016, a friend met a man in the heart of a hardscrabble area of Albuquerque pocked with pawn shops but dotted with well-loved front yards. They stood outside the Allsup’s convenience store at Zuni Road and Kentucky Street SE. The stranger wanted meth, firearms; the friend brought Casanova in. Like Casanova and his friend, the man was black.