A Livingston mother who has been under investigation will not have charges filed against her. In December a fire broke out at the home at 1019 Brock street in Livingston. Three children were killed but Lisa Marie Smith, who was the mother of 2 of the kids, managed to escape. Like all deaths in Polk County, the case was handed over to the DA's office. They presented the case to a grand jury at the end of June and they decided that Smith should not face charges.