Exclusion of Relevant Evidence on Grounds of Prejudice, Confusion or Waste of Time. Although relevant, evidence may be excluded if its probative value is substantially outweighed by the danger of unfair prejudice, confusion of the issues or misleading the jury or by considerations of undue delay, waste of time, or needless presentation of cumulative evidence. While Rule 401 is simple and clear cut, this rule is very subjective. While the MSPB does not seem to recognize a distinction between legal and logical relevance, it closely follows the Federal Rules. Limit yourself to evidence you really need .
Judges get bored easily.
If you present all of the evidence that is arguably relevant you are going to lose the judge's attention. I have always felt that it is better to earn 7 points in ten minutes than earn 10 points in two hours. The key thing to remember is to have a theme to your case. While the charge tells why the person is technically guilty, the theme tells the judge why you are right . Once you have proved the basic elements of your charge, concentrate on evidence that persuasively supports your theme.