Although this is very wrong, a scientist can manipulate the results of his experiment so that it seems that his theories about something are true. This can be done to gain prestige and recognition, but it is false and should never be practiced. When this happens, the scientist provides information with bias, which is not what is expected of any scientific branch.
The type of information you are looking for is called confirmation/confirmatory biased information. (If I am misunderstanding the question, please correct me) Scientists sometimes skew the results or lie about the results in order to support their own personal beliefs or goals.
