Authorities believe the call was made by Dugbor after he fatally shot his fiancee, 31-year-old Katrina Banks, and her son, 15-year-old Kevin Johnson. He then killed himself, KSDK reported.
Dugbor and Banks got engaged last month, according to the Post-Dispatch.
Katrice Noble, a childhood friend of Banks' who reconnected with the 31-year-old later in life, described her to KSDK as "very determined, very committed."
“She was determined to be the best in the classroom,” Noble told the news station, recalling their shared childhoods. “She was the student that her peers liked. She joined any activity that there was. She was that all around young lady.”
Police continued Sunday to investigate the circumstances that led to the shooting.
Authorities said the 4-year-old girl was taken to a hospital after the shooting as a precaution. KSDK reported that police planned to release her to family members.