feeding her child salt at toxic levels. >> reporter: 26-year-old lacey spears blogged constantly, posted multiple times a day on twitter, myspace and facebook. she wrote about parenting and play time with her son, garnett, and her son's chronic illness. my sweet angel is in the hospital for the 23rd time she tweeted in 2009. garnett was 1. five months ago january 23rd, spears posted on facebook, garnett the great journeyed onward today at 10:20 a.m. tuesday, charges of depraved murder and manslaughter were filed against lacey. >> this has been a research, plan and executed crime against her own son in a wanton and depraved manner. >> reporter: authorities suspect she poisoned the boy three times in january. during his last hospital stint, she had unmonitored access to her son and his sodium level spiked to suspiciously high levels. >> it's tragic when the caregive of any child does anything but