Lawyers for a woman accused of killing her grandson say it may not have been her fault.
Becky Trujillo's trial is taking place in Commerce City, she's charged with first-degree murder.
But her lawyers say the 4-year-old may have had a tumor-like mass that caused his brain damage.
Police and firefighters say the boy was skinny and bruised when they responded to an emergency call at Trujillo's home. Trujillo was the boy's legal guardian.