So, we know for certain Oswald was an LN accused in 1977 in the HSCA investigation attempting to place a call to one John Hurt from the Dallas city jail on the night before Ruby gunned him down in the basement of the same building.
My own opinion about this is not much of an issue. Suprisingly,
I am working from WR and HSCA named leads, John Hurt & Lev Aronson and the names on the alleged Tippit murder weapon purchase coupon names, Drittal and Hidell.
Here, John Hurt's wife, a solo cellist, name spelled here remarkably similarly to the last name of the person "vouching for Hidell" in 1963, is reported performing in NYC in the same week in Nov., 1940 as Piatigorsky, and his 1976 obituary in
images below describes him performing in 1939 at same NYC Town Hall location as Ana Drittel.