andrea bradley and glen bates charged with aggravated murder in the beating death of their two-year-old daughter glenara .
glenara was brought to the hospital last month with bruises , belt marks and bite marks , a head injury and broken teeth .
prosecutors say at the time of her death the toddler was weighing only 13 lbs .
coroner said it was the worst case of starvation she 's even seen .
in her final days , glenara ate and slept in a bathtub filled with feces and blood .