Robert F. Kennedy's daughter KERRY Kennedy has been found not guilty of driving while impaired.

The 54-year-old activist/writer was arrested in 2012 after she drove her car into a tractor-trailer and tests later revealed a small amount of a sleeping medication in her blood.

Kennedy, who maintained she took the pill by mistake, was found not guilty by a jury at Westchester County Courthouse in New York on Friday (28Feb14).

After the case's conclusion, she said, "To tell you the truth, anger is the last feeling I have right now. I'm full of gratitude."