In 1942, during the German occupation of Latvia, while he served a parish in Ostron, a German policeman died. He knew the man to be impenitent, and denied him burial in hallowed ground. This refusal required him to hide from German occupation authorities.[1]
After the Soviet re-occupation of Latvia in 1944, he resumed parish work.[1] He was arrested on 25 October 1950 and sent to prison in Riga. On 24 March 1951, he was sentenced to 10 years of forced labor for "organizing anti-Soviet nationalist gangs and for anti-Soviet propaganda." He was deported to the Komi Autonomous Republic and worked at coal mine no. 10 in Yurshor, camp department no. 10 of Rechlag in the Arctic Circle. Mendriks secretly fulfilled his priestly duties in the labour camp.
Death
On 19 July 1953, inmates at Vorkuta, who were forced to work in the region's coal mines, went on strike during the Vorkuta uprising. The mostly passive strike was put down on 1 August, when Soviet Army troops were ordered by the Vorkuta Gulag camp chief Derevyanko to fire at the strikers, resulting in the death of at least 53 prisoners. While the workers of Vorkuta were protesting and rioting, Mendriks decided to move to the front row of the prisoners, believing that as a priest he should be where the people were dying to prepare them to meet God. Mendriks started reciting the formula of absolution: "Misereatur vestri Omnipotens Deus" in the front row and was shot dead by a Soviet Army soldier.[2]
