Question: Which American man claimed the song "Exit" by U2 influenced him to murder Rebecca Schaeffer?

Context paragraphs:
Exit (U2 song): "Exit" is a song by rock band U2.  It is the tenth track on their 1987 album "The Joshua Tree".  "Exit" was developed from a lengthy jam that was recorded in a single take and edited down to a shorter arrangement.  The lyrics, which portray the mind of a serial killer, were inspired by lead singer Bono's reading of Norman Mailer's 1980 novel "The Executioner's Song", and other related works.  In his trial for the murder of Rebecca Schaeffer, Robert John Bardo used "Exit" as part of his defence, claiming the song had influenced his actions.

Scenes from the Class Struggle in Beverly Hills: Scenes from the Class Struggle in Beverly Hills is a 1989 American black comedy film co-written and directed by Paul Bartel.  "Scenes" re-unites Bartel with his "Eating Raoul" co-stars Mary Woronov and Robert Beltran.  "Scenes" also stars Jacqueline Bisset, Ray Sharkey, Ed Begley, Jr., Wallace Shawn, Paul Mazursky, and Rebecca Schaeffer.

Robert John Bardo: Robert John Bardo (born January 2, 1970) is an American man serving life imprisonment without parole after being convicted in October 1991 for the murder of American actress Rebecca Schaeffer on July 18, 1989, whom he had stalked for three years beforehand.

Agyen Kokobo: Agyen Kokobo (fl. 1500) was a southern Akan migrant leader in what is now Ghana.  He is believed to have been the earliest leader and founder of the Akwamu kingdom, which he led from around 1480 to around 1500, possibly later.  While serving as the Akwamu Chief, Agyen Kokobo ruled the state with his mother as the queen mother.  Even today, rulers of the Akwamu kingdom still claim to be descendants of Agyen Kokobo; in the 1960s, one man claimed to be his 28th descendant.

My Sister Sam: My Sister Sam is an American sitcom starring Pam Dawber and Rebecca Schaeffer that aired on CBS from October 6, 1986 to April 12, 1988.

Troy Davis: Troy Anthony Davis (October 9, 1968 – September 21, 2011) was an American man convicted of and executed for the August 19, 1989, murder of police officer Mark MacPhail in Savannah, Georgia.  MacPhail was working as a security guard at a Burger King restaurant when he intervened to defend a man being assaulted in a nearby parking lot.  During Davis's 1991 trial, seven witnesses testified they had seen Davis shoot MacPhail, and two others testified Davis had confessed the murder to them.  There were 34 witnesses who testified for the prosecution, and six others for the defense, including Davis.  Although the murder weapon was not recovered, ballistic evidence presented at trial linked bullets recovered at or near the scene to those at another shooting in which Davis was also charged.  He was convicted of murder and various lesser charges, including the earlier shooting, and was sentenced to death in August 1991.

Moonlight Mile (film): Moonlight Mile is a 2002 American romantic drama film written and directed by Brad Silberling.  This film was loosely inspired by writer/director Brad Silberling's own experience.  He was dating actress Rebecca Schaeffer at the time she was killed by an obsessed fan in 1989.

Cambodian jungle girl: The so-called Cambodian jungle girl is a Cambodian woman who emerged from the jungle in Ratanakiri province, Cambodia on January 13, 2007.  A family in a nearby village claimed that the woman was their daughter Rochom P'ngieng (born 1979) who had disappeared 18 or 19 years previously; the story was covered in most media as one of a feral child who lived in the jungle for most of her life.  However, some reporters and non-governmental organizations (NGOs) questioned this explanation and suggested that she instead might be an unrelated woman who had been held in captivity.  In 2016, a Vietnamese man claimed that the woman was his daughter who had disappeared in 2006 at age 23, following a mental breakdown.  He was able to provide documentation about the woman's birth and disappearance, and shortly after brought her back to his village in Vietnam.  He received the support of her adoptive family as well as the approval of immigration officials.

Wesley Bad Heart Bull: Wesley Bad Heart Bull was the name of a Native American man.  He was the victim of a murder in which a White Air Force veteran by the name Darld Schmitz stabbed Bad Heart Bull to death.  The murder and subsequent handling of his murder is cited as the catalyst for leading to the events later known as the Wounded Knee incident.

John Giuca: John Giuca (born October 1983) is an American man who was convicted on a charge of second-degree felony murder in the death of 19-year-old Mark Fisher in October, 2003.  Giuca was arrested a year after the murder, he was found guilty along with trigger-man Antonio Russo; both were given a sentence of 25 years to life.

Supporting paragraphs: Exit (U2 song) Robert John Bardo
Answer: Robert John Bardo