The Polish daily newspaper Nowiny Rzeszowskie (Rzeszów News) on 2 August 1990 published an interview with World War II Captain Wacław Kopisto, a soldier of the elite Polish Cichociemni unit, who took part in the raid on the Nazi German prison in Pińsk on 18 January 1943.
Kopisto stated, when asked about any Jewish person in his unit alluding to Gray, that among the sixteen Polish soldiers in his partisan group there was in fact a Polish Jew from Warsaw by the name of Zygmunt Sulima, his own long-term friend and colleague after the war.