A Catholic cardinal touted as one of the favourites to replace Pope Francis said he was "stepping back" from office Tuesday after an AFP investigation revealed at least five women had accused him of sexual assault. Spanish-born Cristobal Lopez Romero, 74, the Archbishop of Rabat in Morocco, denies wrongdoing. One woman who said he molested her made a written complaint about the cardinal in May to the Vatican embassy in Morocco, which AFP has seen.