After the war ended, Weinrich was interned in the Eselheide internment camp from 1945 to 1950. He underwent denazification proceedings and was adjudged to be in Category I, Major Offenders.
Following World War II's conclusion, Weinrich was incarcerated at the Eselheide internment camp from 1945 to 1950. He participated in denazification proceedings and was deemed a major offender.