Read about it some time ago. Oswald supposedly hired Cruz to work with him in New Orleans. Oswald headed up the office at The "Fair Play for Cuba Committee," a pro-Fidel Castro outfit, which happened to be located in the same building as the C_A. The famous picture of the two, shows them handing out propaganda pamphlets to people on the streets of New Orleans.
Apparently, Cruz followed Oswald out to Dallas. I believe Cruz had a connection to Dallas, he had gone to school out there prior to New Orleans. When JFK and Oswald were killed, Cruz hightailed it to Canada.