Medical findings, a seized ring, electronic messages and household interviews became separate pieces of the investigation into the 3-month-old’s death.
LAKELAND, Fla. — Jessica Vlasac told deputies that she had fallen asleep with her 3-month-old son and woke to find him unresponsive. Investigators say four different parts of their inquiry eventually pointed away from that explanation: the autopsy, a ring found on Vlasac’s hand, messages involving the baby’s father and statements from other people inside the home.
The Polk County Sheriff’s Office arrested Vlasac, 42, on Sept. 10 and accused her of aggravated child abuse after Medical Examiner Dr. Stephen Nelson concluded that the infant had suffered three separate head impacts and that an injury pattern was consistent with contact from Vlasac’s large ring. Nelson also told investigators there was no evidence that co-sleeping caused the death. The arrest did not resolve every question about the case, however. Publicly released information does not supply a full chronology of the fatal injuries, identify a motive or establish that anyone witnessed the child being struck. The criminal allegation remains subject to the court process.
The first strand of evidence began with the condition of the infant. Deputies responded to a Lakeland residence at approximately 11:58 p.m. Sept. 6 after receiving a report of an unresponsive child. The baby was transported to Orlando Health Medical in Lakeland and pronounced dead shortly afterward, according to the sheriff’s office. Authorities observed an abrasion and bruising on his head. Vlasac said she had accidentally fallen asleep beside him and remembered nothing else before awakening to find him face down on the bed, not moving and cold. She also made a statement indicating that she believed she had killed her son, though she attributed what happened to the period when she was asleep.
The second strand emerged at autopsy. Nelson found subdural hemorrhaging and three separate impact injuries involving the baby’s head, investigators said. Among them was an L-shaped forehead injury approximately 1.7 centimeters by 1 centimeter. Its shape suggested to the medical examiner that a square-like object may have been involved. That finding was important not because it identified a suspect by itself, but because it supplied a specific physical characteristic detectives could compare with objects encountered during their investigation. Nelson’s broader findings also gave investigators reason to reject co-sleeping as the cause described in Vlasac’s first account.
The third piece developed almost incidentally during a later interview. Detectives noticed that Vlasac was wearing a ring with a large diamond-like stone, according to authorities. Its shape appeared similar to the square-type object Nelson had described after examining the infant. Investigators sought and obtained a search warrant covering the ring and Vlasac’s devices. As deputies took possession of the jewelry, the sheriff’s office said, Vlasac asked whether the ring was the item that had killed the child. The agency reported the remark as part of the investigation but did not say that she admitted deliberately striking the baby.
Investigators then turned that observation into a direct forensic comparison. Nelson examined the seized ring and advised detectives that injuries to the infant were consistent with being struck by it as part of the impacts documented during the autopsy, according to the sheriff’s office. The agency’s account did not release photographs, laboratory measurements or the complete medical examiner’s report, so the public record does not allow an independent assessment of that comparison. Nor does the summary explain whether Nelson concluded that every impact came from the ring. What authorities have stated is narrower: the ring was consistent with the injury pattern, and the medical findings did not support co-sleeping as the cause of death.
A fourth strand came from electronic communications. The infant’s father provided detectives with messages exchanged with Vlasac, investigators said. Those records showed that she had purchased alcoholic shots at about noon on the day of the death, according to the sheriff’s office. The father separately told authorities that Vlasac becomes violent when drinking. His description remains an attributed allegation, and officials did not release evidence showing how much alcohol Vlasac consumed or whether alcohol was medically established as a factor. Later that night, however, authorities said Vlasac sent several messages stating that she had killed the infant and that he was dead. Investigators also said some messages had been deleted.
The communications continued to matter after the night of the death. The baby’s father told detectives that Vlasac called him several days later and seemed unusually normal while discussing their son, according to the sheriff’s office. A description of someone’s demeanor is necessarily subjective, and investigators have not suggested that appearing calm or normal itself proves a crime. The father also reported a more concrete exchange: He said Vlasac asked him not to show detectives their messages. Authorities did not release the entire conversation or say whether it was recorded. They nevertheless included the reported request when explaining the evidence that preceded Vlasac’s arrest.
The fifth source of information was notable for what it did not establish. Other people were in the house when the infant became unresponsive, but none reported seeing an assault or anything suspicious beforehand, the sheriff’s office said. They believed Vlasac and the baby were sleeping in the bedroom and did not realize an emergency had occurred until they heard her screaming. Their statements therefore did not give investigators a direct witness to the injuries. Instead, they helped define the physical circumstances surrounding the event: Vlasac was caring for the child in the room, others were nearby but unaware of a problem, and the crisis became apparent only afterward.
The evidence described by the sheriff’s office is consequential, but there are limits to what can responsibly be stated from it. Authorities have not publicly supplied a motive for the alleged abuse. They have not released a complete interrogation of Vlasac, a full forensic report, all recovered phone data or a precise sequence explaining when each of the three impacts occurred. The infant’s identity has also not been made public. Those gaps do not erase the evidence cited in support of the arrest, but they matter when distinguishing an investigative theory from facts that have been fully tested in court. Vlasac is accused of a crime; the publicly available record reviewed here does not establish a conviction.
The sheriff’s office charged Vlasac with aggravated child abuse, describing it as a first-degree felony in connection with the infant’s death. Other public jail information reported by news organizations listed separate accusations of resisting an officer with violence and battery on an officer, firefighter or emergency medical worker. The publicly released narrative about the baby’s death did not detail what allegedly led to those counts. Authorities said Vlasac was booked into the Polk County Jail and initially held without bond. Reports published soon after the arrest listed upcoming court proceedings, including an arraignment in October.
What happened procedurally after those initially scheduled hearings is less clear from reliable public information available for this report. Searches of official and established reporting sources did not produce a sufficiently documented later disposition to justify stating that the case had reached a particular outcome by Oct. 21. The sheriff’s office, meanwhile, said its investigation remained ongoing when it announced the arrest. That leaves the evidentiary picture more developed than the publicly verified procedural one: investigators have described why they rejected an accidental co-sleeping explanation and why they focused on Vlasac, but the ultimate legal determination remains a matter for the courts.
The distinction is particularly important in a case where much of the public attention has centered on a single unusual object. The ring is striking evidence because investigators say its shape corresponded with an injury and because the medical examiner later examined the actual jewelry. But the sheriff’s account does not present the ring in isolation. It places that evidence alongside multiple head impacts, Vlasac’s initial explanation, her statements to deputies, messages supplied by the father, deleted communications and the observations of people in the home. Taken together, those facts explain the basis authorities have publicly given for the arrest without resolving the questions a prosecution and defense would address if the allegations proceed through adjudication.
Author note: Last updated Oct. 21, 2026.