Sept 23 (CNN) -- British-born Samantha Lewthwaite was once seen as a kind of victim of the July 2005 London terror attacks -- the pregnant wife of one of the suicide bombers who killed 52 people, now left alone to care for her children. She condemned the attacks but then vanished. Now, Kenyan authorities say, she is the infamous "White Widow," alleged to be a supporter and financier of people linked to the Somali terror group Al-Shabaab.