Shirley Reed identified one of the fire victims who died as her son, 37-year-old Corey Reed.
A second man also died. His name was being withheld on Monday pending an autopsy.
News 8 also learned investigators were looking into whether this home was illegally operating as a rooming house.
Another big question was whether the house had smoke alarms.
“The answer is yes, there are smoke alarms present in the building and throughout the building, but it’s part of the investigation whether they were effective or not working,” Chief John Alston said.
On Monday, one resident of the home was still hospitalized in critical condition.
New Haven Fire is being assisted by the State Fire Marshal and the Medical Examiner’s Office.
Web Extra: Mother of New Haven fire victim speaks to News 8