Question: Jack Levin interviewed two serial killers who are identified by the same nickname in what city?

Context paragraphs:
Female Serial Killers: Female Serial Killers: How and Why Women Become Monsters is a non-fiction true crime history by Peter Vronsky, a criminal justice historian.  It surveys the history of female serial killers and female-perpetrated serial homicide, its culture, psychopathology, and its investigation from the Roman Empire to the mid-2000s.

Macabre (band): Macabre is an extreme metal band from Chicago, Illinois.  They blend thrash metal, death metal, and grindcore (sometimes with nursery rhymes and folk melodies) to form their own unique style dubbed murder metal.  Lyrically, they have a strong focus on serial killers, mass murderers and a touch of sick gore humor.  Most lyrics are based upon true stories and are about real infamous personalities.  The content of the lyrics is historically accurate, and band members actually have known and met with convicted serial killers such as John Wayne Gacy on a personal level.  They also have a side project called the "Macabre Minstrels" that play acoustic camp fire songs.  Their current label is Decomposed Records.

Academy maniacs: Artyom Alexandrovich Anoufriev (born October 4, 1992) and Nikita Vakhtangovich Lytkin (born March 24, 1993) (Russian: Артём Александрович Ануфриев и Никита Вахтангович Лыткин ) are two serial killers from Irkutsk, Russia.

Serial Killers (musical group): Serial Killers is a musical group composed of B-Real, Xzibit, and Demrick.  The group was formed in 2013 and released their first album on October 31 of the same year.  In 2013 Serial Killers teamed up with music video director Matt Alonzo to create a video for their first single, "The First 48".

My Life Among the Serial Killers: My Life Among the Serial Killers: Inside the Minds of the World's Most Notorious Murderers is a book written by Helen Morrison, M.D and Harold Goldberg.  It presents the cases of ten serial killers, and touches on many more.  Morrison spent hundreds of hours in face-to-face interviews, over many years, with several of the subjects.  She uses the individual stories to explain and put forth her ideas on what makes a serial killer.

Serial Killers Ink: Serial Killers Ink is a website dedicated to selling "murderabilia" (collectibles related to murders, murderers or other violent crimes) and serial killer art, interviewing convicted serial killers and also serves as a meeting place for those interested or involved in the murderabilia industry.

Hillside Strangler: The Hillside Strangler, later the Hillside Stranglers, is the media epithet for one, later two serial killers who terrorized Los Angeles between October 1977 and February 1978, with the nicknames originating from the fact that many of the victims' bodies were discovered on the sides of the Hollywood Hills.  The police, however, knew because of the presence of multiple distinct DNA traces and the positions of the bodies that two individuals were killing together, but withheld this information from the press.  These two individuals were discovered to be cousins Kenneth Bianchi and Angelo Buono, who were later convicted of kidnapping, raping, torturing, and murdering ten females, ranging in age from twelve to twenty-eight years old.

Harpe brothers: Micajah "Big" Harpe, born Joshua Harper (before 1768 (probably, c. 1748) – August 1799) and Wiley "Little" Harpe, born William Harper (before 1770 (probably, c. 1750) – February 8, 1804), were serial killers, murderers, highwaymen, and river pirates, who operated in Tennessee, Kentucky, Illinois, and Mississippi, in the late eighteenth century.  The Harpes' crimes appear to have been motivated more by blood lust than financial gain.  They are most likely the United States' first known serial killers, reckoned from the colonial era forward.  The Harpe Brothers are credited with having killed thirty-nine people, and may have killed as many as fifty.

Patrick Kearney: Patrick Wayne Kearney (born September 24, 1939) is an American serial killer who preyed on young men in California during the 1970s.  He is sometimes referred to as "The Freeway Killer", a nickname he shares with two other – separate – serial killers, William Bonin and Randy Steven Kraft.  Kearney may be among the most prolific serial killers in United States history, claiming possibly as many as 43 victims according to law enforcement.

Jack Levin: Jack Levin (born June 28, 1941) specializes in research on murder, prejudice and hate, sociology of aging and sociology of conflict at Northeastern University in Boston, Massachusetts.  He has interviewed and corresponded with brutal killers, such as the Hillside Strangler and Charles Manson, and other violent criminals: serial killers and rapists, mass murderers, and vicious hatemongers.  He is also asked by news and television reports to comment on important occurrences of homicide or hate.  Along with interviews, writing material, teaching classes and research Levin has also given talks about violence or hate to groups including the White House Conference on Hate Crimes, Department of Justice, the Department of Education, OSCE’s Officer for Democratic Institutions and Human Rights and the International Association of Chiefs of Police.  Jack Levin has authored and co-authored over 30 books and has written and published over 200 articles.

Supporting paragraphs: Jack Levin Hillside Strangler
Answer: Los Angeles