The Neenah Police Department on Friday identified the man as 43-year-old Shawn Blowers of Menasha.
Authorities say officers from Neenah and Menasha were serving a search warrant in an Internet Crimes Against Children investigation on Tuesday afternoon. Police say Blowers was the subject of the investigation, and that he confronted officers with a knife and was shot by a Neenah officer.
Blowers was taken to a hospital, where he died. No one else was hurt.
The officer is identified as Neenah police Investigator Christopher Gorden, a law enforcement officer for 11 years. Gorden was placed on standard administrative leave.
The Wisconsin Department of Justice is leading an investigation into the shooting.