Sac County in Iowa
Cold Cases in Sac City, Iowa
Mark E. Koster
610 N. 5th St.
Sac City, Iowa
Went Missing: July 4, 2009
Declared Deceased: October 10, 2011
Remains Discovered: November 5, 2012
Mark Koster was reported missing to the Sac City (IA) Police Department on July 4, 2009, and legally declared dead by accidental or other violent means on Oct. 10, 2011. His remains were discovered buried in the basement of his former Sac City home on November 5, 2012.
If you have any information about this case please contact the Sac City Police Department at (712) 662-7772.