Question: What producer who died in 1978 developed American television detective show Mannix?

full_context: Document 1: Leslie Bricusse: Leslie Bricusse (born 29 January 1931) is an English composer, lyricist, and playwright, most prominently working in musicals and also film theme songs.
Document 2: Bruce Vilanch: Bruce Gerald Vilanch (born November 23, 1948) is an American comedy writer, songwriter and actor. He is a six-time Emmy Award-winner. Vilanch is best known to the public for his four-year stint on "Hollywood Squares", as a celebrity participant; behind the scenes he was head writer for the show. In 2000, he performed off-Broadway in his self-penned one-man show, "Bruce Vilanch: Almost Famous".
Document 3: List of Mannix episodes: The following is a list of episodes for the detective television series "Mannix" which aired from 1967 to 1975 in the United States on the CBS television network. The title character, Joe Mannix, is an Armenian-American private investigator played by Mike Connors (who was also of Armenian heritage). "Mannix" was created by Richard Levinson and William Link and developed by executive producer Bruce Geller (who also created "").
Document 4: Miami Vice: Miami Vice is an American television crime drama series created by Anthony Yerkovich and executive produced by Michael Mann for NBC. The series starred Don Johnson as James "Sonny" Crockett and Philip Michael Thomas as Ricardo "Rico" Tubbs, two Metro-Dade Police Department detectives working undercover in Miami. The series ran for five seasons on NBC from 1984 to 1989. The USA Network began airing reruns in 1988, and broadcast an originally unaired episode during its syndication run of the series on January 25, 1990.
Document 5: Bruce Geller: Bruce Bernard Geller (October 13, 1930 – May 21, 1978) was an American lyricist, screenwriter, director, and television producer.
Document 6: List of Peter Gunn episodes: Peter Gunn is an American private eye television series which aired on the NBC and later ABC television networks from 1958 to 1961. The show's creator (and also writer and director on occasion) was Blake Edwards. It was also directed by Boris Sagal, Robert Gist, Jack Arnold, Lamont Johnson, one episode by Robert Altman, and several others. A total of 114 thirty-minute episodes were produced by Spartan Productions. Season one was filmed at Universal Studios, seasons two and three were filmed at Metro-Goldwyn-Mayer. Philip H. Lathrop and William W. Spencer were cinematographers on many episodes. Craig Stevens' wardrobe was tailored by Don Richards and Lola Albright's fashions by Jax.
Document 7: Gustave Reininger: Gustave Reininger (1950 – April 19, 2012) was an American scriptwriter who was the co-creator of the NBC TV drama, "Crime Story." The executive producer was Michael Mann. "Crime Story" was based on the Mafia in Chicago, or "The Outfit," and how it got off the streets and into the boardrooms of Las Vegas casinos. The show premiered with a two-hour pilot - movie, which had been exhibited theatrically, and was watched by over 30 million viewers. "Crime Story" then was scheduled to follow Miami Vice on Friday nights, and continued to attract a record number of viewers.
Document 8: Jerry Belson: Jerry Belson (July 8, 1938 – October 10, 2006) was a writer, director, and producer of Hollywood films for over forty years.
Document 9: Mannix: Mannix is an American television detective series that ran from 1967 to 1975 on CBS. Created by Richard Levinson and William Link and developed by executive producer Bruce Geller, the title character, Joe Mannix, is a private investigator. He is played by Mike Connors.
Document 10: Louie Provenza: Detective Lieutenant Louie Provenza is a fictional character from TNT's television crime drama franchise "The Closer"/"Major Crimes." He appeared on all seven seasons of "The Closer" and all six seasonable of "Major Crimes". The character was created by James Duff, and is portrayed by G. W. Bailey. Generally referred to as "Provenza", the character's first name was kept secret until his former partner, George Andrews, was heard to use it for the first time in the penultimate episode of the fifth season. It is said that only captains and above are allowed to address him by his first name and that even his own grandchildren call him "Lieutenant". He is also the only member of his academy class still on active duty with the rest having retired by the beginning of season 2 of "Major Crimes".
Document 11: 77 Sunset Strip: 77 Sunset Strip is an American television private detective series created by Roy Huggins and starring Efrem Zimbalist Jr., Roger Smith, and Edd Byrnes. Each episode was one hour long.
Document 12: Jerry Seelen: Jerry Seelen, whose real name is Jerome Seelen, was an American screenwriter and lyricist born March 11, 1912 in New York City (New York) and died September 12, 1981 in San Diego (California).
Document 13: Levinson &amp; Link: Richard Levinson and William Link were television producers and writers who collaborated for 43 years, until Levinson's death. They created classic television detective series such as "Columbo", "Mannix", "Ellery Queen", "Murder, She Wrote" and "Scene of the Crime", as well as made-for-TV movies including "The Gun", "My Sweet Charlie", "That Certain Summer", "The Judge and Jake Wyler", "The Execution of Private Slovik", "Charlie Cobb: A Nice Night for a Hanging", "Rehearsal for Murder", and "Blacke's Magic". They also collaborated on two feature films: "The Hindenburg" (1975) and "Rollercoaster" (1977).
Document 14: Mike Connors: Mike Connors (born Krekor Ohanian; August 15, 1925 – January 26, 2017) was an Armenian-American actor best known for playing private detective Joe Mannix in the CBS television series "Mannix" from 1967 to 1975, a role which earned him a Golden Globe Award in 1970, the first of six straight nominations, as well as four consecutive Emmy nominations from 1970 through 1973. He also starred in the short-lived series "Tightrope!" (1959-1960) and "Today's FBI" (1981-1982). Connors' acting career spanned six decades; in addition to his work on television, he appeared in numerous films, most notably the 1965 World War II black comedy "Situation Hopeless... But Not Serious", in which he and Robert Redford played American soldiers taken prisoner by a German villager played by Alec Guinness.
Document 15: Bob Brunner: Robert "Bob" Brunner (August 3, 1934 – October 28, 2012) was an American screenwriter, film producer, and television producer. He frequently collaborated in film and television with Garry Marshall, the creator of "Happy Days". Brunner is credited with creating the "Fonzie" nickname for Henry Winkler's character, Arthur Fonzarelli, on "Happy Days". He also created one of Fonzie's key catchphrases, "Sit on it."
ground_truth: Bruce Geller