Exculpatory evidence, evidence that would exonerate you or show your innocence, is required to be given by the prosecution to the defense and must be given or else face a mistrial or full dismissal of the charges.  Evidence submitted by your lawyer should be considered but ultimately your lawyer must also be responsible for the type of evidence submitted as part of his or her strategy.  If the trial is not over and you did not do the crime and you feel the lawyer will help in some fashion (keeping in mind that the court may consider that a 7 year old's memory could be fleeting), you should raise the issue with your lawyer. If your trial attorney still refuses, consider asking the court in a motion due to ineffectual counsel to reassign a new attorney to your case.