Mother-of-five Hannah Overton was sentenced to life in jail almost five years ago for the murder of a child she was trying to adopt.
This week the 35-year-old was back in a Texas courthouse to try and get her capital murder conviction overturned and convince a judge she did not intentionally poison the four-year-old but that he did it to himself.
Andrew Burd, who was taken away from his meth-addicted mother when he was two years old, died in 2006 from salt poisoning. When he arrived at hospital after collapsing and convulsing at home.
Blood tests revealed he had salt poisoning, or hypernatremia, as his levels were almost double the norm and among the highest ever recorded.