Blumenthal was born on October 13, 1928, in Flatbush, Brooklyn, New York City, the son of Bennet M. Blumenthal (1888–1980)[1] and Matilda Blumenthal. He graduated B.A. from the College of William & Mary in 1949, and LL.B. from New York University School of Law in 1951.[2] He served in the U.S. Army from 1951 to 1953. He was admitted to the bar in 1953, practiced law in New York City, and entered politics as a Democrat. On May 18, 1958, he married Joel Marie Winik, and they had four children.
At the general election in November, Blumenthal ran on the Liberal ticket but was again defeated by Beame. Blumenthal was Majority Leader of the State Assembly in 1975 and 1976.
In December 1975, Blumenthal was indicted for perjury in connection with his support of nursing-home operator Bernard Bergman.[4] In February 1976, Blumenthal moved to dismiss the charges.[5] At first, bribery was also added to the indictment, but on April 13, 1976, all charges were dismissed.[6] On June 9, 1976, he announced that he would not run again for the Assembly.[7] On December 14, 1976, the New York Supreme Court, Appellate Division unanimously upheld the dismissal of all charges against Blumenthal.[8]
Afterwards he moved to Larchmont, in Westchester County. Later he was a member of the New York State Commission on Law Revision.
