On the morning before Thanksgiving 2020, 27‑year‑old Melissa Lamesch — nine months pregnant and preparing to name her son Barrett — was discovered dead in her burning home in Mount Morris, Illinois. What first appeared to be a tragic house fire soon became the focus of a murder investigation that would center on a local firefighter‑paramedic who had been involved with Melissa.
Melissa, an EMT who had returned to her childhood house to be near family ahead of the birth, had stayed in intermittent contact with the baby’s father, Matthew Plote. According to family and acquaintances, Plote resisted involvement in the pregnancy: he urged her to have an abortion at one point and later kept the pregnancy hidden from some people, including coworkers and supervisors. On the morning of Nov. 25, 2020, Melissa spoke with her sister Cassie for more than two hours. The call ended when Cassie said Melissa saw someone at the door; Melissa told her she would call back. She never did.
Neighbors reported a fire shortly afterward. First responders found Melissa’s body on the kitchen floor in front of the stove. Although much of the kitchen sustained heavy fire damage, investigators noted that Melissa’s body showed little thermal injury and there was no soot in her airways. Blood tests returned carbon monoxide levels inconsistent with death caused by the blaze. Two autopsies, including one by forensic pathologist Dr. Amanda Youman, identified signs of a violent struggle and hemorrhages around the neck consistent with strangulation. Investigators concluded she had been killed before the fire was started.
Plote, then 33 and employed by the Carol Stream Fire District as a firefighter‑paramedic, acknowledged being at Melissa’s house on the day she died. He told investigators he had gone there to discuss the pregnancy and hospital plans. He did not notify his employer about the death and the fire at the time; months later the fire chief learned Plote had been on the scene and put him on administrative leave while authorities probed the case. In interviews with detectives, Plote often gave brief, measured responses. In one lengthy session he said, in effect, he had not intended to hurt Melissa — a remark prosecutors later highlighted as chilling and potentially revealing.
Fire investigators ruled out accidental causes after a detailed examination of the stove and oven showed no signs they had been on when the blaze began. The origin point and burn patterns led state fire investigators to conclude the fire had been intentionally set, and prosecutors argued at trial that the fire was used to conceal a homicide. Defense experts disputed the arson finding during the trial, calling the investigation inconclusive and suggesting that the cause could not be determined with certainty.
Investigators pursued digital records, search warrants and physical evidence recovered from the damaged home. An Amazon Echo retrieved from the kitchen contained audio with voices but nothing that directly tied to the killing. A more decisive development came from DNA testing: analysts found Plote’s DNA under Melissa’s fingernails. Combined with other evidence and testimony, that finding formed the basis for an arrest warrant.
On March 9, 2022, Plote was arrested and charged with first‑degree murder, arson and the intentional homicide of an unborn child. He pleaded not guilty. Defense attorneys argued he had been open about his presence at Melissa’s home and that the prosecution had not proved he was the killer. Prosecutors presented a motive centered on Plote’s alleged efforts to avoid fatherhood and conceal the pregnancy: they contended he killed Melissa and set the fire to destroy evidence.
The case went to trial in Ogle County. Prosecutors called forensic pathologists and state fire investigators who testified to the autopsy findings — no soot in the airway, carbon monoxide levels inconsistent with death by fire, and petechial hemorrhages and neck injuries consistent with manual strangulation — and to their conclusion that the kitchen fire was deliberately set. The defense brought in experts, including a retired firefighter and an independent inspector, who challenged the certainty of the arson determination and urged caution in interpreting the evidence.
Family members attended and testified, describing Melissa as caring and excited to be a mother. They recalled her last phone call, when she told her sister she had seen someone at the door and would call back. Melissa’s funeral on Dec. 14, 2020, included a burial for her unborn child; her relatives later donated toys and organized memorials in the baby’s honor.
After deliberation, the jury convicted Matthew Plote in March 2024 of first‑degree murder, arson and intentional homicide of an unborn child. At sentencing on June 27, 2024, the judge imposed a life sentence without possibility of parole. Prosecutors called the outcome justice for Melissa and her family; relatives said nothing could replace the loss.
The case attracted attention for how it combined evidence from autopsies, fire investigation, DNA analysis and digital records, and for the complicated dynamic of a public‑servant figure accused of a violent crime. While the defense disputed key aspects of the prosecution’s theory, the jury sided with the state. Melissa’s family continues to remember her and to honor the child she never met.