Authorities are investigating the death of a 38-year-old woman whose body was found in her Brockton apartment. The Plymouth district attorney on Saturday identified the woman as Florence Beaulieu, a mother of four. Neighbors said one of the children came home and discovered the body Friday afternoon. District Attorney Timothy Cruz said in a statement that there would be an autopsy to determine how the woman died. Cruz said police were called to the home after a 911 call, but no further details were released.