It was at this time that Bolt himself fell foul of the law, and as part of the Committee of 100 was arrested and imprisoned for protesting against nuclear proliferation. He refused to be "bound over" (i.e., to sign a declaration that he would not engage in such activities again) and was sentenced to one month in prison because of this. The producer of the Lawrence film, Sam Spiegel, persuaded Bolt to sign after he had served only two weeks. Bolt later regretted his actions, and did not speak to Spiegel again after the film was completed.