You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
American_Broadcasting_Company

Context:
On September 3, 1958, the Disneyland anthology series was retitled Walt Disney Presents as it became disassociated with the theme park of the same name. The movement in westerns, which ABC is credited for having started, represented a fifth of all primetime series on American television in January 1959, at which point detective shows were beginning to rise in popularity as well. ABC requested additional productions from Disney. In late 1958, Desilu Productions pitched its detective series The Untouchables to CBS; after that network rejected the show because of its use of violence, Desilu then presented it to ABC, which agreed to pick up the show, and debuted The Untouchables in April 1959. The series went on to quickly become "immensely popular".

Question:
Why did CBS turn down the pitch for The Untouchables?

its use of violence