According to Wikipedia: "Richard Levinson was an American screenwriter and producer who often worked in collaboration with William Link.
Levinson was born in Philadelphia, Pennsylvania. He attended the University of Pennsylvania, where he earned a Bachelor's Degree in Economics in 1956. He served in the United States Army from 1957 to 1958 and married actress Rosanna Huffman in 1969.
William Link and Richard Levinson began a 43-year-long friendship in 1946, on their first day of junior high school. Both were avid Ellery Queen fans from boyhood and enjoyed mental puzzles and challenges, a characteristic that would spill over into their work.
Beginning with radio scripts, the team wrote plays and then prime-time TV scripts. They went on to co-create and sometimes produce the detective television series Columbo, Mannix, Ellery Queen, Murder, She Wrote (with Peter S. Fischer) and Scene of the Crime, as well as made-for-TV movies 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, Guilty Conscience, and the short-lived TV series Blacke's Magic. The team were proud of creating "intelligent" rather than violent programs.