Guys give me a sign.. this tread seems dead
I hope I'm wrong but I don't think we'll see any further significant posts on Harry Grey anytime soon.
We already have some biographical details provided by his son Simeon for the Palm Springs Walk Of Stars. Simeon was born in 1941 and probably does not know the full extent of his father's criminal career. It's likely that the details he provided are sanitized to enable Harry to be accepted for a Star and he may be confusing him with another Harry Grey who was a musician and a producer of many films and shows.
We have some details provided by Sergio Leone (Gili, De Fornari, Simsolo and Cahiers) and I wrote to Stuart Kaminsky once about Grey but didn't get a reply.
Factually we have copies of censuses for 1910, 1915, 1920, 1925, 1930 and 1940, a copy of the death index and a short obituary which was published in the NY Times.
There is a Harry Goldberg (born 1901) in the 1910 census for the Jewish home.
I can find no record of Harry in the censuses for Sing Sing or any details of the family in the 1935 census.
The 1940 census was only fairly recently published and I may have a further look when the 1945 census is available.