Brady Harmon has revealed the text messages he received on the same day investigators believe his ex-wife began orchestrating the mass poisoning.

Sarah Myers, 44, and her mother, Amy Steadman, 64, are accused of orchestrating the June murder-suicide that left Myers' four children dead inside an upstate New York home.

Brady Harmon has revealed the text messages he received on the same day investigators believe his ex-wife began orchestrating the mass poisoning.