He served five years in prison before being freed in 1951 when the U.S. High Commissioner in Germany, John J. McCloy, unilaterally overturned his conviction.
In the years preceding World War I Henckel was estimated to be the second-wealthiest German subject, his fortune exceeded only by that of Bertha Krupp von Bohlen und Halbach.
Krupp | Bertha | Gustav Krupp von Bohlen und Halbach | Friedrich Krupp Germaniawerft | Bertha von Suttner | Bertha of Bingen | Bertha Krupp | Friedrich Alfred Krupp | Fred Krupp | Boxcar Bertha | Bertha Palmer | Bertha Knight Landes | Alfried Krupp von Bohlen und Halbach | Uwe Krupp | Big Bertha (howitzer) | Big Bertha | Bertha Wellin | Bertha Sánchez | Bertha Runkle | Bertha Merrill Holt | Bertha Lum | Bertha Lewis | Bertha Jaques | Bertha Jane Grundy | Bertha Gifford | Bertha, daughter of Lothair II | Bertha Damon | Bertha "B" Holt |
Bohlen's great-great-uncle was American Civil War General Henry Bohlen, born 1810, the first foreign-born (German) Union general in the Civil War and grandfather of Gustav Krupp von Bohlen und Halbach (who used the name Krupp after married Bertha Krupp, heiress of the Krupp family, the German weapons makers).