An Elk Grove woman and a 10 year old boy were killed and an infant is in critical condition this morning after a head on collision on the Jackson Highway, near Rosemont. According to the CHP, the woman and the 10 year old were not wearing seat belts and the infant was not properly restrained. According to the driver of a van that collided with the Honda Accord, the woman drifted over the center line. He tried to brake and get out of the way, but was unable to avoid the collision. The van driver suffered minor injuries. The CHP has not confirmed that the woman and the two children were related.