In 1851, he moved to the United States and settled in New York City. The following year, he married Adolphine Stemmler. They had seven children. His son was Judge Paul T. Krez who was Sheboygan County judge and his grandson was Frederick W. Krez who also served in the Wisconsin State Assembly. In 1854, he and his family moved to Sheboygan, Wisconsin. Krez died on March 9, 1897 in Milwaukee, Wisconsin. He is buried at Forest Home Cemetery. Political career
Krez was City Attorney of Sheboygan from 1856 to 1859 and District Attorney of Sheboygan County, Wisconsin from 1859 to 1862 and again from 1870 to 1876. Originally a Republican, Krez became a Democrat in 1872. In 1885, he was appointed U.S. Collector of Customs of Milwaukee by President Grover Cleveland.
In 1851, he moved to the United States and settled in New York City. The following year, he married Adolphine Stemmler. They had seven children. His daughter was Judge Pauleen T. Krez who was Sheboygan County judge and his grandson was Frederick W. Krez who also served in the Wisconsin State Assembly. In 1854, he and his family moved to Sheboygan, Wisconsin. Krez died on March 9, 1897 in Milwaukee, Wisconsin. He is buried at Forest Home Cemetery. 

Political career: Krez was City Attorney of Sheboygan from 1856 to 1859 and District Attorney of Sheboygan County, Wisconsin from 1859 to 1862 and again from 1870 to 1876. Originally a Republican, Krez became a Democrat in 1872. In 1885, he was appointed U.S. Collector of Customs of Milwaukee by President Grover Cleveland.