updated 5/24/2011 6:46:55 PM ET 2011-05-24T22:46:55

ORLANDO, Fla. — The attorney for a Florida woman [Case Anthony]charged with killing her 2-year-old daughter outlined a bombshell defense Tuesday, contending the toddler accidentally drowned in a swimming pool and her grandfather covered it up. After nearly three years of sensational details and rumors in tabloids and television shows, Casey Anthony's murder trial got under way in an Orlando courtroom.

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