Horowitz was appointed to the Washington State Court of Appeals, Division I, in 1969.[1] In 1974, he was elected to the state supreme court,[2] assuming office the following year.[1] He retired in 1980,[2][1] and returned to private practice until the month before his death.[2]
Personal life
On March 23, 1930, Horowitz married Diana Glickman, with whom he had two daughters.[3] He died in Seattle at the age of 84.[2][3]