First Crowned Queen Consort of England…and Murderer? | Queen Aelfthryth of Devon

Queen Aelfthryth (also known as Elfrida) is remembered mostly for two things: being the first crowned queen consort in England (and the only Anglo-Saxon one), and for being accused of the murder of her step-son, King Edward, in order to place her son, Aethelred, on the throne. But was Aelfthryth really a murderer? Or are there other possible scenarios?