The family of a 12-year-old boy accused of killing a 10-month-old baby by throwing him to the floor says the boy is innocent. They blame the baby's 7-year-old brother.

Officials say the 12-year-old was left alone last month at a Houston home with a group of younger children by the mothers of the two sets of kids. The other kids said they saw the 12-year-old throw the baby on the floor.

But a spokesman for the 12-year-old's family said Thursday the baby's 7-year-old sibling held his little brother, who had been crying, and threw him down the stairs in the house.

The 12-year-old is being held on a charge of capital murder.