 Welch's murder contributed to passage of the Intelligence Identities Protection Act of 1982, making it illegal to reveal the name of an agent who has a covert relationship with an American intelligence organization.In July 2002, a hospital employee named Pavlos Serifis (born 1956) confessed that he had participated in Welch's murder along with 17N's alleged mastermind Alexandros D. Giotopoulos (born 1944), Pavlos's uncle Ioannis Serifis (born 1938), and a tall, blonde "Anna.