Mom 9 months pregnant missing for a month, last seen at boyfriend's house, family says

A pregnant mom of four, who was nine months pregnant at the time, has been missing for over a month and was last seen at her boyfriend's home, her family said. 

Emma Baum, 25, disappeared on Oct. 10 in Gary, Indiana. 

Baum's family said she was last seen at her boyfriend's house that day, and Baum's mother believes the boyfriend had something to do with her disappearance, WGN9 reported. Baum's boyfriend is in custody but is being held in connection with an unrelated case, Gary Police Commander Jack Hamady told the outlet.