A 73-year-old Missouri man walked down his street on the night of July 25, confronted a mother and her teenage daughter over a noise dispute, and opened fire — killing them both. The deaths of Jessica Lashly, 38, and her 17-year-old daughter, Jersey Greer, have left a community mourning and a surviving twin sister trying to piece together a life she never imagined living alone.
Robert Winkelman approached the family’s House Springs home, about 40 minutes southwest of St. Louis, and began questioning Lashly and Jersey, according to the Jefferson County Sheriff’s Office (JCSO). The confrontation escalated quickly. Winkelman drew a firearm and shot Lashly in the head. When Jersey rushed to her mother’s side in an attempt to help her, Winkelman allegedly shot the teenager in the head as well.
A third person who had come outside after hearing the initial gunshot was then chased by Winkelman, but she was not shot. Captain Matt Moore of the JCSO said the woman managed to escape into the home and secure the door before the gunman could reach her.
A Neighbor Dispute Turns Deadly
When deputies arrived and located Winkelman outside his own home, he turned the gun on himself and fired. All three — Lashly, Jersey, and Winkelman — were transported to the hospital in critical condition. On July 27, the JCSO announced that Lashly and Jersey had died from their injuries. Winkelman remained hospitalized for more than a week before dying on August 2.
Authorities had charged Winkelman with two counts of first-degree murder as well as two counts of armed criminal action. Captain Moore told KSDK that investigators believed the shooting appeared to stem from an ongoing disagreement about noise between Winkelman and the family. Multiple witnesses at the scene were able to provide investigators with an account of what happened, according to the JCSO.
A Twin Left to Grieve
Jersey Greer was the twin sister of Justice Greer, who was at work the night of the shooting and learned of the attack after the fact. The two had planned to start their senior year side by side at Northwest High School in Cedar Hill — a milestone they had looked forward to sharing. Both girls played on the school’s lacrosse team, and the twins had spoken openly about their dream of playing college lacrosse side by side.
Justice remembered her sister as inseparable from her in every sense — someone whose laugh and personality were impossible to ignore. She described Jersey as the funniest person she had ever known, someone who could make anybody smile regardless of the moment. The small, everyday irritations between sisters — Jersey barging into Justice’s room uninvited — have become the moments Justice said she would give anything to have back.
Jersey’s final act was one of instinct and love. Rather than retreating when her mother was shot, she moved toward her. Justice has held onto that image since the night she lost them both. “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.”
Remembering Jessica Lashly
Jessica Lashly raised her twin daughters as a single mother, working hard to provide for the family of three. Justice described her mother as endlessly supportive — a woman whose dedication to her daughters was never in question. The household was small and close-knit, built on a bond between a mother and her girls that Justice said defined everything she knew about daily life.
Both Lashly and Jersey were registered organ donors. Justice found meaning in that fact even in the depths of her grief, saying their organs would go on to save the lives of others.
Community Rallies Around Surviving Sister
In the days following the shooting, Northwest High School’s lacrosse team organized a GoFundMe fundraiser on Justice’s behalf. Originally launched to help cover medical bills, the campaign shifted its focus to funeral costs after Lashly and Jersey died. As of the most recent reporting, the effort had raised more than $55,000.
Justice is now navigating a grief that is difficult to put into words — the loss of her mother and the other half of herself, all at once. Every time she looks in a mirror, she sees her sister’s face looking back at her. The future she had mapped out for herself included Jersey at every turn: the same hallways, the same lacrosse field, the same college dreams. None of that plan exists anymore the way she had imagined it.
“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.”