Khirshberg Mozus born 31 December 1906 in Riga, in the family of a merchant; father — Nokhem Yankel; mother — Zlata Dina (née Yoel). Studied at the Riga Exchange Commercial School. In 1924, completed the Riga City German Secondary School. From 1925, studied political economy at the University of Latvia; from 1928, law; completed in 1930. Also studied law at the Herder Institute. Was a member of the Zionist society “Olim.” In 1932–33, performed compulsory military service in the Latvian Army (artillery unit at the mouth of the Daugava river), with the rank of corporal. From 29 November 1933, assistant to sworn advocate Ya. Tumbils; from 11 April 1934, assistant to sworn advocate P. Pavlov in Riga. Active in the Russian Legal Society in Latvia. During the Soviet occupation, in January 1941, enrolled in the Bar Association; from 1 May 1940 — sworn advocate. Killed in the Riga Ghetto in 1941. Married Olga Gurevich (17 December 1908 — 1941, Riga Ghetto); divorced. Brother-in-law — sworn advocate in Petrograd. Philister of the Jewish student corporation “Vetuliya.”

Works: Izdevuma līgums. (The Publishing Contract). Riga, 1938.