In a horrific incident in Florida, US, a 6 year old beat up his infant sister to death while their mother was out shopping. The mother has been charged with murder after her son allegedly beat his 13-day-old baby sister to death. Kathleen Marie Steele, 62, was arrested and charged with aggravated murder of a child. Kathleen took along her three young children in a minivan on Monday afternoon to a cellphone repair shop.

When she got there, she rolled up the windows, turned off the engine, locked the doors and left the children: a 6-year-old boy, his 3-year-old brother and their baby sister, born 13 days earlier. While the mother left them alone in the minivan for at least 38 minutes. While Kathleen was in a cell phone shop, the infant started crying. Steele's eldest son allegedly removed his newborn sister from her car seat and beat her to death. According to news reports, he slammed her head onto the ceiling, banged her head on the floor and dropped her numerous times, which ultimately led to the baby's death.

The infant allegedly had sustained severe head trauma that included extensive bruising and multiple skull fractures said a news release. The mother was arrested on a charge of aggravated manslaughter of a child. The mother allegedly did not notice that the baby was unresponsive until she got home and went to take the newborn out of the car. Due to his age, 6 yr old brother will not be criminally charged with his sister's death. The mother, however, is currently being held at the jail.