As he ranted about his religious beliefs, a 32-year-old Wisconsin man went room to room with a 9mm pistol early Wednesday -- killing his pregnant teenage wife, his baby son and two nieces in a brick home on the Southwest Side, according to his family and Chicago Police.
Wounded in the rampage were the suspect's mother and a teenage nephew, police and family said.
A 12-year-old girl in the house managed to escape and ran to a gas station, where she called 911. The gunman shot at her as she fled but missed, police said.
About an hour and a half after the horrific 4:25 a.m. shooting in the 7200 block of South Mozart, officers were taking witnesses to a police station …