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Special Agent John Christophersen Receives "Medal of Distinction" from Black River Falls


PORTAGE - Special Agent John Christophersen, a 1979 graduate of Portage High School, was recently awarded the "Medal of Distinction" from the City of Black River Falls for his investigative work into the attack on a local business owner. 


On July 30, 2003 officers of the Black River Falls Police Department were called to the Krueger Service Station in the City of Black River Falls to investigate a report of an injured citizen. Officers found the proprietor, Robert Krueger, on the floor of his business suffering from serious head injuries. 


Initial information indicated the injuries were the result of an accidental fall. However, subsequent medial evidence proved the injuries were the result of intentional blunt force trauma, possibly inflicted during the commission of a strong arm robbery.  


Special Agent John Christophersen of the Wisconsin Department of Justice's Division of Criminal Investigation was assigned to work along with Black River Falls Investigator David Frederick. Together, they began an investigation into the circumstances surrounding the incident. Having very little evidence to proceed, the investigative team embarked on a six year long investigation during which they dedicated countless hours in pursuit of the person responsible for the injury to Mr. Krueger. 


Special Agent Christophersen and Investigator Frederick followed every possible lead, conducted close to 100 interviews, and chased down dozens of leads. Eventually, their hard work paid off and lead to the establishment of a John Doe Investigation, which showed that the person responsible for the attack was Darrin D. O'Neill.  Mr. O'Neill was subsequently charged with One Count of Aggravated Battery with Intent to Cause Great Bodily Harm and One County of Robbery with Use of Force. 


On July 28, 2009 O'Neill pled guilty to Aggravated Battery with Intent to Cause Great Bodily Harm. The charge of Robbery with Use of Force was dismissed but read into the court records. O'Neill was sentenced to the maximum penalty of 10 years confinement concurrent with the prison sentence he was currently serving along with 5 years extended supervision. O'Neill was serving a sentence for another attack on an elderly person. 


The Medal of Distinction was given in recognition of Special Agent Christophersen's untiring determination, professional dedication, investigative skills, and experience. 


"I am very proud that the vitally important work John Christophersen is doing is being recognized by the City of Black River Falls," said Wisconsin Attorney General J.B. Van Hollen. "John's dedication is an inspiration to all of us working in law enforcement to make Wisconsin a safer place. John's dedication to the people of Wisconsin exemplifies the commitment to excellence that we look for throughout the Wisconsin Department of Justice." 

John Christophersen graduated from Portage High school in 1979 and has been in Law Enforcement since 1980.  He started his career as a police dispatcher for the Portage Police Department.  During this time he was also a volunteer firefighter for the city of Portage.  In 1982, John became a certified law enforcement officer as a patrol officer for the village of Pardeeville.  In 1984, he joined the Reedsburg Police Department as a patrol officer. 


In 1989, John left Reedsburg to become a Special Agent with the Wisconsin Department of Justice, Division of Narcotics Enforcement, assigned to the Eau Claire regional office.  In 2000, John transferred to the Division of Criminal Investigation, Gaming Enforcement Bureau.  In 2002, John again transferred bureaus, joining the Special Assignments Bureau working on death investigations.  He is currently working in DCI's Eau Claire field office.


A photo of Special Agent Christophersen with Black River Falls Police Chief Donald Gilberg is available at: