Sigler established a successful legal career in various firms in Detroit, Hastings and Battle Creek, Michigan.

Dewey carried Michigan, but Sigler was unsuccessful that year, as he was defeated for re-election for governor by Democrat Soapy Williams.

After running unsuccessfully for re-election, Sigler left office on January 1, 1949, and retired from political life.

Nearly five years after leaving office at the age of fifty-nine, Sigler and three passengers were killed when the plane he was piloting on a foggy night collided with a television broadcast tower (WBCK-TV) near Augusta, Michigan.

The inscription reads:[2] Kim Sigler (1894-1953), a native of Schuyler, Nebraska, received his law degree from the University of Detroit in 1918.

He first practiced law in Detroit, where he worked in the office of Edwin Denby, former secretary of the navy, and Judge Arthur Webster.

Kim Sigler’s vigor and courtroom manner led to his selection as a special prosecutor for a grand jury probe of legislative graft in 1943.