Hero or bandit? Questions over the legend of Pancho Villa

Some describe him as Mexico's Robin Hood, others say he was the last man to lead an invasion on the USA. For many Mexicans Pancho Villa has been a much loved revolutionary hero. But a new book about his life reveals a dark side to the man and uncovers an age-old family feud. BBC Mundo's Juan Carlos Perez Salazar and Mexican journalist Lourdes Heredia discuss the myths and legends around Pancho Villa.