Robert Webster followed a path similar to that of Lee Oswald. He was a Navy veteran who “defected” to the Soviet Union. He lived there a few years, married a Russian woman... possible “honey pot” tasked with getting information form foreigners residing in the country. In his case, when he come back to the US he left is Russian wife behind.

There were others and Webster is an example of others who followed the same pattern.

The Other Oswald: A Wilderness of Mirrors
by Gary Hill

This book is the story of two men who began an odyssey together that became a thread, which when unraveled, reveals how Cold War paranoia escalated into the death of a president. Robert Edward Webster and Lee Harvey Oswald were manipulated like marionettes on strings of espionage. Unraveling these strings (or threads) may lead us to the puppeteers controlling them. Were these “controllers” orchestrating a series of events that would lead to JFK's assassination?