His assassination led to the passage of the Intelligence Identities Protection Act, making it a crime to expose or identify officers working in covert roles who had not officially been acknowledged as such by the U.S. government.

[4] His death helped turn the political tide back in favor of the CIA after the damning revelations by the Church Committee earlier in 1975.

Giotopoulos was sentenced to multiple life terms in 2003 as the moral instigator of a string of assassinations, bombings, rocket attacks, and bank robberies from 1983 to 2000.

[7] Onassis died on March 15, 1975, but conspiracy theorists propose that the Welch assassination plan was resumed by his daughter Christina in December 1975.

[8] A fictionalized version of Welch appears as a recurring character in the shared world anthology series Heroes in Hell, edited by Janet Morris.

Welch works for one of Satan's various intelligence agencies, interacting with the likes of Julius Caesar and taking fellow agent Tamara Bunke as his lover.