She could be released if judge gives her lower end of the sentencing scale.
Johnson faces between two-to-nine years behind bars in the case involving the disappearance of her missing infant son, Gabriel.
She's already been in jail for nearly three years and will get credit for time served...meaning she could be released if the judge hands down a lenient sentence.
Her eight-month-old son was last seen in Texas in December 2009.
The infant's paternal grandfather hopes Johnson will face child abuse or murder charges in Texas.