Prosecutors say witness statements, surveillance footage and DNA evidence helped build the case in southeastern Minnesota.

MAZEPPA, Minn. — A 69-year-old western Minnesota man has been charged in the death of a Lakeville woman who was found dead inside her camper at a campground near Lake Zumbro, more than six months after deputies first called the case suspicious.

Stanley Alan Munstermann was charged in Wabasha County with intentional second-degree murder, second-degree murder without intent and first-degree manslaughter in the death of Barbara Ann McBride-Law, 66. Authorities say the case moved from an unexplained campground death on Aug. 30, 2025, to a homicide investigation after autopsy findings, witness interviews, surveillance video and later DNA testing gave investigators a clearer picture of McBride-Law’s final hours.

Deputies were called to Mac’s Park Place on Aug. 30 after McBride-Law failed to appear for an 11 a.m. potluck and someone went to check on her, according to the court record described by local news reports. First responders found her dead in bed inside her camper. Munstermann had been staying with her in the days before her death, and campground video showed him arriving on Aug. 28 and leaving early on Aug. 30. He later told investigators the two were longtime high school friends and not romantically involved. He said he drank heavily the night before, blacked out and did not remember going into or leaving the camper.

What first looked unclear became more suspicious as investigators gathered details from the scene. Search warrant records described bruising on McBride-Law’s upper arm, damage to a wall near her head and a small white vase under her neck with what appeared to be blood on it. The medical examiner also found lacerations inside her mouth, petechiae in the eyes and bruising on the outside of her neck. Later reporting on the criminal complaint said the autopsy found a brain injury that could be consistent with smothering or strangulation. Prosecutors also said Munstermann’s DNA was found on the vase and under McBride-Law’s fingernails. Those details gave investigators a stronger evidentiary path than they had in the first days of the case.

The timeline outside the camper also drew attention. Munstermann told investigators he woke up driving on Interstate 90 near Rochester around 3:30 a.m. and then continued to his girlfriend’s home in Plainview, Nebraska. But later reporting on the complaint said surveillance from a Kwik Trip in Austin did not match his account. Earlier warrant reporting also said a witness placed McBride-Law alive around 6:30 a.m., and another account in the record said Munstermann’s truck did not leave the campsite until about 7:30 a.m. Those pieces did not settle every question about the final minutes before McBride-Law died, but they helped investigators challenge parts of Munstermann’s story and narrow the window in which they believe the killing happened.

Witness statements added another layer. According to investigators, Munstermann made troubling remarks after he reached Nebraska. One person told police he said he thought he may have killed someone but could not remember. KSTP reported that his girlfriend told investigators he was scared of himself, thought someone was badly hurt, did not know who, and said he did not feel like himself or like a good person. Those statements did not stand alone, but prosecutors appear to be using them alongside the physical evidence, the surveillance record and the shifting timeline to argue that the death was not accidental and not the result of a medical emergency.

The case also reflects how long homicide investigations can take when the first scene does not immediately point to a cause of death. When McBride-Law was found, authorities publicly said there was no obvious injury or trauma. Search warrants filed less than two weeks later painted a more violent picture, and the Southern Minnesota Regional Medical Examiner’s Office later classified the death as homicide caused by homicidal violence. McBride-Law, whose obituary identified her as Barbara Ann McBride and listed her birth date as July 28, 1959, was buried months before charges were filed. By the time Munstermann was arrested on Feb. 26, 2026, the investigation had stretched across at least two states and relied on interviews, digital records and forensic work.

Munstermann made his first appearance in Wabasha County court on Monday, March 2, and local reporting said his conditional bail was set at $1 million. The charges leave prosecutors more than one path as the case moves forward, including an intent-based murder count, a felony murder count and a manslaughter count. Court records available in public reporting did not resolve whether prosecutors plan to argue a single method of killing or present alternative theories tied to the autopsy findings and the evidence inside the camper. The next milestones are likely to include omnibus hearings, additional defense review of the forensic material and possible challenges to statements, search warrants and DNA handling.

For people who knew McBride-Law, the arrest answered one question while leaving others. The campground where she died sits near Lake Zumbro in a place better known for seasonal gatherings than for a homicide case. Her death first surfaced as a sudden campground emergency, then turned into months of public uncertainty before authorities announced an arrest. The filing now shifts the focus from rumor and piecemeal warrant disclosures to what prosecutors can prove in court and what defense lawyers may contest about the scene, the timeline and Munstermann’s own statements.

Munstermann had been charged and had made an initial court appearance, and the case was moving into its next pretrial phase in Wabasha County.

Author note: Last updated March 30, 2026.