Investigators say a 73-year-old Missouri man fatally shot a 38-year-old woman and her 17-year-old daughter about 8:30 p.m. on July 25, 2026, before turning the weapon on himself, concluding a confrontation that authorities believe originated from a dispute over noise. The suspect died from his self-inflicted injuries on August 2 while hospitalized.
The victims, Jessica Lashly and her daughter Jersey Greer, were outside their House Springs residence — located roughly 40 minutes southwest of St. Louis — when the neighbor approached them, according to the Jefferson County Sheriff’s Office (JCSO).
Deputies say Robert Winkelman shot Lashly in the head during the encounter. Jersey ran to assist her mother and was also shot in the head, investigators said. A third individual who emerged from the house after the first gunshot was pursued by the armed man but managed to get back inside and lock the door, escaping injury. Capt. Matt Moore of the JCSO confirmed the woman was able to secure herself inside before Winkelman reached her.
Responding officers found Winkelman outside his residence, where he had shot himself. Emergency responders rushed all three people to a hospital in critical condition. Lashly and Jersey succumbed to their wounds on July 27. Winkelman survived for several more days before dying more than a week later.
Charges Filed Before Suspect’s Death
Prosecutors filed charges against Winkelman on July 26, initially bringing two first-degree assault charges and two charges of armed criminal action. After the mother and daughter died, authorities upgraded the assault charges to first-degree murder.
Multiple witnesses provided statements to detectives, the JCSO reported. Capt. Moore told KSDK the investigation indicated an ongoing disagreement between Winkelman and the family over noise had preceded the deadly encounter.
Twin Sister Left Behind
Justice Greer, Jersey’s twin, was at work when the shooting occurred and learned of the tragedy afterward. The sisters had anticipated beginning their senior year together at Northwest High School in Cedar Hill, a moment they had eagerly awaited. Both played lacrosse for the school and had talked about their shared ambition to continue playing the sport in college.
Justice recalled her sister as someone whose presence was unforgettable — the funniest person she’d ever encountered, capable of lifting anyone’s spirits. Small annoyances that once marked their daily lives, like Jersey entering Justice’s room without asking, are now memories Justice treasures.
Jersey’s response in the moment of crisis was to rush toward her wounded mother rather than flee. “Jersey’s last moments, she was trying to save my mom,” Justice told KSDK. “It just shows how brave she is, and I hope I can be half as brave as she is.”
A Single Mother’s Legacy
Jessica Lashly had been raising her twin daughters on her own, working to support the tight-knit household of three. Justice remembered her mother as unwavering in her support, a woman whose commitment to her children shaped every aspect of their lives together.
Both Jersey and Lashly had registered as organ donors. Justice took solace in knowing their organs would help save other lives, finding some meaning amid overwhelming loss.
Fundraiser Exceeds $55,000
Northwest High School’s lacrosse team launched a GoFundMe campaign to support Justice in the aftermath of the tragedy. Initially created to assist with medical expenses, the fundraiser’s purpose changed to covering funeral costs after the two victims died. The campaign has collected more than $55,000 as of recent reports.
Justice now faces a future she never anticipated — one without her mother or the sister who shared her face, her plans, and her dreams. Every glance in a mirror reminds her of Jersey. The life she had envisioned included her twin at every milestone: the same school hallways, the same lacrosse field, the same college aspirations. That vision no longer exists in the form she had imagined.
“It was always just us three,” Justice said of her family. “It’s going to be really hard because that’s all I’m used to.”