Heartbroken father blasts ‘broken’ system that let family massacre take his children before they could reunite

A father is grieving the loss of his four young children following an alleged murder-suicide poisoning plot . Speaking with Fox News Digital, the children's father, Brady Harmon, said nothing could have prepared him for the shocking and devastating news. He said, "There is no preparation. It's horrendous." The children's grandmother is suspected of poisoning the four children and their mother before taking her own life in Mechanicville, New York , police said during a Thursday news conference .