Today I wrote an article about two Saints who did not act very saintly before their conversions.  St Olga was a mass murderer and destroyed an entire town in revenge for her husband's murder.  Olga's grandson, St Vladimir, had his brother murdered and put his sister-in-law in his harem. 
http://larry-putt.suite101.com/murderous-saints-st-olga-and-st-vladimr-a399782

Happy Reading!