Evaluate the valence intensity of the following sentence, considering the mental state of the author. Present a score between 0 and 1, where 0 denotes extremely negative and 1 denotes extremely positive.
Sentence: Torricelli also insisted that he had not done any unusual favors for Chang, who first turned to the senator in 1995 for help in winning the repayment of some $71 million he said he was then owed in a failed business deal with the North Korean government.