Tanya Saracho is the showrunner for acclaimed television series “Vida,” on Starz. The show looks at the relationship between two sisters, Lyn and Emma, as they come to terms with the death of their mother and the secrets she kept from them. Saracho sits down with Latino USA to share the story of how she got where she is today and why telling complicated—sometimes dark— stories about Latinos is so important to her.