(Rochester, MN)  —  Rochester police say a woman was critically wounded and her boyfriend is in custody after a shooting believed to have happened on Christmas Eve.  Authorities say the father of the 37-year-old victim’s children called police after being unable to reach her when she didn’t show up for a custody exchange Christmas morning.  A five-year-old told responding officers their mother was hurt, and a two-year-old girl was also in the apartment.  The victim had a gunshot wound to her head.  Police say the suspect had a magazine on him with rounds matching the caliber of the bullet in the apparent shooting.