State Directory

Cold Cases in Wisconsin

ColdCaseIndex documents 8 cold cases in Wisconsin, spanning 1953–2005. 6 of these cases remain fully unsolved. Each case page includes documented details, status, and information on how to submit a tip.

8 Documented Cases
6 Still Unsolved
1953–2005 Year Range
4 Case Types

By Type

4 Homicides 2 Missing Persons 1 Unidentified Person 1 Serial Killer Victims

By Status

6 Unsolved 2 Conviction

All Wisconsin Cases

Conviction 2005

Teresa Halbach

Freelance photographer Teresa Halbach disappeared after photographing a vehicle at the Avery Salvage Yard. Her remains were found on the property. Steven Avery and his nephew Brendan Dassey were both convicted of murder.

Manitowoc County Homicide Age 25
Unsolved 2002

Alexis Patterson

Seven-year-old Alexis Patterson disappeared near her Milwaukee school on the same day Elizabeth Smart was abducted in Utah. Alexis's disappearance received far less media coverage, sparking national conversation about ra

Milwaukee Missing Person Age 7
Unsolved 1991

Lois Teufen

Thirty-five-year-old Lois Teufen was found murdered in Wausau, Wisconsin in August 1991. Despite investigation, the case went cold. It remains in Marathon County cold case files.

Wausau Homicide Age 35
Unsolved 1979

Linda Mack

Thirty-two-year-old Linda Mack was found murdered in Green Bay, Wisconsin in February 1979. Despite investigation, the case went cold. It remains in Brown County cold case files.

Green Bay Homicide Age 32
Unsolved 1979

Robin Elizabeth Voss

Seventeen-year-old Robin Elizabeth Voss was found murdered in Milwaukee, Wisconsin in September 1979. Despite investigation, the case went cold. It remains in Milwaukee County cold case files.

Milwaukee Homicide Age 17
Conviction 1978

Jeffrey Dahmer Victims

Jeffrey Dahmer murdered 17 young men and boys in Wisconsin and Ohio, engaging in necrophilia and cannibalism. He was convicted of 15 murders in Wisconsin and sentenced to 15 life terms. Fellow inmate Christopher Scarver

Milwaukee Serial Killer Victims
Unsolved 1976

Wisconsin Dells Jane Doe

The skeletal remains of an unidentified young woman were found in Wisconsin Dells in January 1976. Despite forensic analysis and DNA testing decades later, she has never been identified. Her case remains in NamUs.

Wisconsin Dells Unidentified Person
Unsolved 1953

Evelyn Hartley

Fifteen-year-old Evelyn Hartley disappeared while babysitting in La Crosse, Wisconsin. Blood and her shoe were found at the scene. Despite a massive investigation, she was never found. Her case remains one of Wisconsin's

La Crosse Missing Person Age 15