David Grosse Death & Obituary: It is with profound sadness that we announce the untimely passing of David Grosse, a 74-year-old Milwaukee resident and dedicated landlord, who was tragically killed on Sunday, February 2, 2025. David’s life was taken in a shocking act of violence, leaving his family, friends, and the community devastated by this unimaginable loss.
The Tragic Incident
According to the Milwaukee County Medical Examiner’s Office, David Grosse was fatally stabbed at an apartment near 31st and State in Milwaukee. West Allis police were initially called to the area of 61st and Lincoln after 37-year-old Justin Lannigan, the tenant accused of the crime, reported the incident himself. Lannigan has been charged with first-degree intentional homicide.
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Court documents reveal that Lannigan called David to fix a refrigerator. When David was inspecting the appliance, Lannigan attacked him, resulting in approximately 30 stab wounds. Multiple knives were found at the scene. Lannigan later confessed to the crime, citing paranoia fueled by “social media research” on platforms like TikTok and YouTube, where he believed David had installed surveillance cameras in his apartment.
Legal Proceedings and Mental Health Evaluation
Justin Lannigan is currently undergoing a court-ordered competency examination to assess his mental state, with a report due by March 3, 2025. Court filings indicate that Lannigan had been diagnosed with bipolar disorder and schizophrenia, and had become increasingly reclusive in recent months, according to his family members.
Remembering David Grosse
David Grosse was more than just a landlord; he was a committed member of the Milwaukee community, known for his dedication and kindness. His life, marked by hard work and compassion, touched many people. Friends, family, and tenants remember him for his warm demeanor and willingness to help others.
A Community in Mourning
The tragic loss of David Grosse has left an indelible mark on those who knew him. As legal proceedings continue, his family and friends seek justice and closure. This heartbreaking event also highlights the importance of addressing mental health issues within our communities to prevent such senseless acts of violence.
Final Thoughts
We extend our deepest condolences to David Grosse’s family, friends, and all who were impacted by his life and tragic death. May his memory be a source of comfort and strength during this difficult time. Rest in peace, David Grosse. Your life mattered, and your legacy will endure in the hearts of those who knew and loved you.