A Memphis police officer is in critical condition after his cruiser was hit by another vehicle. The crash happened early ySunday morning while the officer had his blue lights on as he was blocking traffic headed south on McLean near Overton Park. The traffic was being blocked so MLGW could work on downed power lines. A woman who had her two young children in the back seat of her vehicle is accused of DUI, among other charges, and is expected in court this morning.