Amanda Knox is a 2016 American documentary film about Amanda Knox, twice convicted and later acquitted of the 2007 murder of Meredith Kercher, directed by Rod Blackhurst and Brian McGinn. It premiered at the Toronto International Film Festival on September 10, 2016 and on Netflix on September 30, 2016.
Amanda Knox was found guilty of murder
The context says that Knox was convicted of murder twice. Therefore, it is true to say that she was found guilty of murder, because she was found guilty on two separate occasions. The computer probably missed the nuance that makes the statement true because the computer knows that she was eventually also acquitted. 