An 11 year-old boy named Jordan Brown killed his father's fiance. Her name was Kenzie Houk and she was eight months pregnant.
The state police believe that the murder weapon was a 20-gauge youth shotgun.
In Pennsylvania, there is no lower limit for the age someone to be charged as an adult with criminal homicide.
If convicted,Jordan, now 12, faces life inprison without the possibility of Parole.