A 27-year-old Janesville man is facing charges including Physical Abuse of a Child -Recklessly Causing Great Bodily Harm after a weekend incident.  Janesville police say officers were dispatched to the 300 block of North Washington Street just after 1:00 a.m. Saturday morning for a disturbance.  The initial caller was a 12-year-old child telling an emergency dispatcher their mother was being physically assaulted by her boyfriend in a vehicle parked outside the home.  Police say the woman was able to escape and run to the house, where the 12-year-old and a friend attempted to hold the door closed, but Samuel O. Ryan violently forced his way into the house.  One child suffered a broken wrist in the struggle.  Ryan left the home before police arrived, but officers were able to track him down Sunday in Fort Atkinson with the help of Jefferson County Sheriff’s Deputies.  He’s currently in the Rock County Jail awaiting an initial court appearance.