Angela Camacho broke down on the stand as she testified against her former common law husband John Allen Rubio.
The Brownsville man is accused in the murder and decapitation of the couple's three children back in March 2003.
Camacho is serving a life sentence for her role in their deaths.
The Brownsville woman broke down on the stand after being shown pictures of their children prior to their brutal deaths and beheadings.
Rubio had been given the death penalty in the case but was granted a new trial by a higher court.
A state district judge granted a change of venue to Hidalgo County where the trial started on Monday.
Jurors have already heard from police officers and other witness but Camacho expected to continue testifying this afternoon.
Action 4 News will provide more information as it becomes available.
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