For more than a year, Assembly Speaker John Pérez dated a Hollywood funeral director who faces fraud allegations in one of the biggest financial scandals to rock the U.S. funeral industry. During their relationship, Pérez, a Los Angeles Democrat, mixed political business with his personal life in ways that showed poor judgment, ethics experts say. A Pérez spokesman said the lawmaker conducted himself appropriately during a casual dating relationship. Tyler Cassity, proprietor of a boutique cemetery called Hollywood Forever as well as a Mill Valley cemetery, and defendant in a $600 million fraud lawsuit in his native Missouri, accompanied Pérez...