La Crosse Man Accused of Homicide Ruled Competent for Trial

John P. Stumlin, a 56-year-old man from La Crosse, Wisconsin, accused of first-degree intentional homicide and hiding the body of his roommate Daniel Riordan, has been ruled competent to stand trial after previously being deemed incompetent. Riordan's decomposed body was discovered in August 2024 concealed under vegetation behind a trailer where both men lived, with an autopsy indicating he suffered multiple blows to the head from a sharp instrument. Following his arrest, Stumlin was hospitalized at Mendota Mental Health Institute for treatment related to mental illness. A subsequent evaluation in July 2025 led the court to determine Stumlin can now participate in his legal defense. His preliminary hearing is scheduled for August 20, 2025, and he remains in custody under a $1 million cash bond. The case involves evidence of prior domestic incidents, a blood cleanup, and attempts to conceal the crime scene.