The phrase 'as prisoner' is correct and can be used in written English.
It implies a person who is being kept in captivity or under control of another. For example: He was held as prisoner in the dungeon for three days.
The result was five months in Brixton Prison as prisoner No. 2917 (Clark 1975).
He failed, was captured, and later died, aged 93, as "Prisoner Seven" in Berlin's Spandau prison.
Education advocates have turned to the courts to force spending for schools, just as prisoner advocates have done to force spending for prisons.
In letters and articles, Brasillach dwelt on the male companionship that marked his student years, his brief period of captivity as prisoner of war and his five months in prison.
Mr. Skilling, now also known as prisoner 29296-179, first began serving his sentence at a prison in Waseca, Minn.
Upon his release in 1986, he was transported to Auburn State Prison, where he began serving his New York sentence as Prisoner 86A-6005.
From 1966 onwards, Hitler's deputy - whose Allied guards were required to only address him as Prisoner Seven - was the sole inmate in the 600-cell prison.
Manning carried off as prisoner; later exonerated.
Enter SIR BEN KINGSLEY, holding Gemma ARTERTON as prisoner.
As Prisoner No Y4146, he became a jailhouse boxing champion.
In it, he lists his occupation as "prisoner" and his home address as "No.
