Krough served several parishes in the area, including: St. Pius X, Lourdes High School and St. Francis of Assisi, Assisi Heights in Rochester; St. Augustine, Pacelli High School and St. Edward in Austin; Brownsdale's Our Lady of Loretto; and Winona Cotter High School.

In 1993, he was confronted with the discovery of a photo of a naked child found in his residence. He admitted taking the photo in about 1978, when the boy was 16, but denied other actions.

In 1997, the diocese learned Krough had sexually abused a minor male from 1979 to 1981. He resigned from active ministry at Assisi Heights in Rochester in 2002 after he was confronted about inappropriate touching with an adult male.

His laicization was pending at the time of his death.