SPRINGFIELD — State lawmakers on a human services panel were visibly emotional Wednesday as they listened to a domestic violence survivor recount how her estranged husband killed her 18-month-old son. Cassandra Tanner-Miller was standing in her kitchen in September 2019 when “this monster” entered her home through the back sliding doors, asked if she and her two children were “ready to die today” and beat her “relentlessly” and “violently.” He shot her son, Colton, 10 times in the head before Tanner-Miller came to and, with “a mother’s strength,” she said, ran with her daughter, then age 9, out of the home to a neighbor’s garage as her estranged husband was shooting at them.