Beloit Man Found Dead in Wooded Area in South Beloit; Coroner Says Natural Causes Suspected
Officials emphasized that no immediate signs of foul play were found at the scene.
SOUTH BELOIT — Authorities are investigating the death of a 65‑year‑old Beloit man who was found Tuesday morning in a wooded area off Dearborn Avenue, according to the Winnebago County Coroner’s Office.
The man, identified as Joseph Jansen, was discovered shortly before 11:20 a.m. on April 14 by a passerby walking near the 700 block of Dearborn Avenue. The area, a mix of residential properties and tree‑lined lots, is a common cut‑through for pedestrians but is not heavily traveled during mid‑day hours.
Deputies from the Winnebago County Sheriff’s Office responded to the scene after the passerby called authorities to report an unresponsive male in the brush. According to the coroner’s office, first responders determined that Jansen was beyond resuscitation when they arrived. He was officially pronounced dead at 12:33 p.m. by coroner’s staff.
“Preliminary investigation indicates that Mr. Jansen was discovered by a passerby shortly before 11:20 a.m.,” the coroner’s office wrote in its release. “Mr. Jansen was determined to be beyond resuscitation efforts and was pronounced deceased at 12:33 p.m.”
An autopsy was completed shortly after, and early findings suggest that Jansen died of natural causes, though toxicology results are still pending. Officials emphasized that no immediate signs of foul play were found at the scene.
The Winnebago County Coroner’s Office and the Winnebago County Sheriff’s Office are continuing to investigate the circumstances surrounding Jansen’s death. Both agencies routinely collaborate on unattended or unexpected deaths, particularly when they occur outdoors or in public‑access areas.
Jansen, a resident of Beloit, Wisconsin, had no known connection to the property where he was found, according to early information provided to the News. Investigators have not yet released details about his activities prior to his death or how long he may have been in the wooded area before being discovered.
The location, a quiet stretch of Dearborn Avenue near the state line, is bordered by homes, small businesses, and pockets of undeveloped land. Neighbors said the area is typically peaceful, though foot traffic increases during warmer months as residents walk dogs or cut through toward nearby parks and shops.
Mr. Jansen's niece posted this on Facebook late on Wednesday April 15 2026:
Hello, my name is Patrica Jansen, and I am reaching out to the community of Beloit/South Beloit.
On April 14, 2026, my uncle Joesph Jansen was found deceased in a wooded area in South Beloit/Winnebago County. He was 65 years old and, for the most part, in good health. He valued his independence and enjoyed getting around town on his electric bike, which was his primary mode of transportation for running errands in Beloit.
My uncle was a friendly and talkative person who enjoyed conversations with anyone he met. He only knew a small circle of people, but those relationships meant a great deal to him. When we did not hear from him, it immediately raised concern.
Last seen in good health: April 3, 2026
Attempts to contact him: April 7 and April 9, dead phone and no answer to the door. Date found: April 14, 2026. Location: A wooded area approximately a 45-minute walk or 7-minute bike ride from his residence.
We believe he would have traveled by bike rather than on foot. However, his bicycle was not found with him and was also not located at his residence. Sightings or Interactions: Did anyone see or speak with Joesph Jansen on April 3rd, or in the days leading up to April 13th?
Missing Bike: Has anyone seen a silver Velotric Discover 1 e-bike with a milk create attached to the back in the South Beloit/Beloit area?
Any information, no matter how small it may seem, could be incredibly helpful to our family as we seek answers and closure. If you have any information, please reach out to me through private message.
Thank you for taking the time to read this and for any assistance you can provide during this difficult time. Your support means so much to our family. RIP Zippy
The coroner’s office noted that toxicology testing, which is standard procedure in cases where the cause of death is not immediately apparent, may take several weeks to complete. Until then, the official cause and manner of death remain listed as preliminary.
The investigation remains open, but officials have not indicated any threat to the public.
The coroner’s office released the information Wednesday afternoon, adding that further updates will be provided as results become available. “An autopsy has been completed. The preliminary cause of death is consistent with natural causes, pending toxicology results,” the release stated.
Anyone with additional information is encouraged to contact the Winnebago County Coroner’s Office or the Winnebago County Sheriff’s Office.
The News will continue to follow this developing story and provide updates as more details are confirmed.
