In 2010, Nicole Chuminski was convicted of setting a fatal fire at a South Boston row house that led to the deaths of two children, Acia Johnson, 14, and Sophia Johnson, 3. The case, one of Boston’s most high-profile arson trials, has since come under renewed scrutiny amid growing questions about the investigation, forensic evidence, and witness testimony.

The fire occurred in the early morning hours of April 6, 2008, at a home on West Sixth Street that was rented by Anna Reisopoulos, Chuminski’s partner. Investigators initially determined the fire originated in the vestibule area of the house and ruled it an arson based largely on the elimination of other possible causes such as electrical faults or accidental ignition. Lieutenant Frederick J. Hollien of the Boston Fire Department, who led the origin and cause investigation, testified that the fire began on the bottom step of the vestibule stairs where ignitable liquid had been poured and ignited.

However, this conclusion has been challenged by defense attorneys and experts who highlight flaws in the investigative approach. Contemporary fire science recognizes that fires can burn in complex patterns, especially once a room reaches full involvement, making it difficult to accurately pinpoint the origin of a blaze. Critics of the case say investigators relied heavily on outdated assumptions, including the unproven idea that fire only burns “up and out,” and used a method known as “negative corpus” — ruling out accidental causes without finding affirmative evidence of arson.

The forensic analysis of fire debris and clothing, conducted by the state police crime lab, also drew criticism. Initial tests did not find common petroleum-based accelerants such as gasoline. Only after investigator Stephen J. Cunningham requested additional testing for acetone—a less common and highly volatile flammable liquid—did the lab report traces of acetone on pieces of wood from the house’s exterior door frame and on Chuminski’s clothing. Acetone’s presence, however, remains contentious. It is a chemical found commonly in household products and can be produced naturally through the breakdown of burned materials, which the American Society for Testing and Materials cautions should not be taken alone as conclusive evidence of accelerant use. Defense experts argued that the lab’s findings did not meet the threshold required to definitively indicate the presence of an ignitable liquid.

Witness testimony also faces significant challenges. Central to the prosecution’s case was Anna Reisopoulos’s account that Chuminski was present outside the house shortly before the fire started. Yet affidavits obtained years after the trial suggest Reisopoulos was not home during the fire. Marquita Morrissey, a longtime friend and godmother to Reisopoulos’s children, stated that Reisopoulos often said she was absent when the fire broke out. Another affidavit from Mary Fox, serving time for second-degree murder, claimed Reisopoulos confessed to leaving the house for a brief period the night of the fire, expressing guilt over leaving her children alone. Additional evidence, including police reports and interviews, noted that neighbors saw Reisopoulos and her son running toward the house from a nearby public housing development after the fire had begun, consistent with the theory she was away at the time the blaze started.

The background of the couple’s tumultuous relationship also factored into the prosecution’s narrative, with media coverage focusing on a dispute over a stolen wallet taken by Reisopoulos at a family wedding. Prosecutors suggested Chuminski’s alleged motive stemmed from anger over this incident, while defense attorneys and advocacy groups maintain the evidence against Chuminski was circumstantial and flawed.

The New England Innocence Project, representing Chuminski, filed a motion for a new trial, asserting that new evidence and advances in fire science undermine the original conviction. They highlight key omissions, such as the failure to examine electrical wiring in the vestibule ceiling that could have been a potential fire source, and question the credibility of testimony and lab results presented at trial.

Chuminski remains incarcerated at the Massachusetts Correctional Institution in Framingham, where she has served over a decade of her sentence. The case continues to raise important questions about the reliability of forensic fire investigation, prosecutorial conduct, and the justice system’s ability to correct possible wrongful convictions. Court decisions on the motion for a new trial are pending, with advocates hopeful for renewed scrutiny and a fresh examination of the evidence.