Jacob Rubenstein, who legally changed his name to Jack Leon Ruby in 1947, was a Dallas businessman and nightclub owner. He was convicted of the November 24, 1963 murder of Lee Harvey Oswald, two days after Oswald's arrest for the assassination of President John F. Kennedy. He successfully appealed his conviction and sentence of death. As a date for his new trial was being set, he took ill and died. Wikipedia
The definitive Wikipedia entry for Jack Ruby. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Jack_Ruby
A biography of Jack Ruby and his involvement in the JFK assassination aftermath. This includes his trial for the murder of Lee Harvey Oswald. www.goochinfo.homestead.com/ruby.html
APPENDIX XVI - A Biography of Jack Ruby In this appendix the Commission presents a biography of Jack Ruby. www.jfk-assassination.de/warren/wcr/page779.php