Rule for Courts-Martial (RCM) 1001(b)(4) allows the prosecution, during the sentencing phase of a court-martial, to introduce evidence of the accused’s prior, uncharged misconduct. The standard that governs the admissibility of this evidence is that it must be reliable and must be offered to show the accused’s character and potential for rehabilitation. The prosecution must provide the defense with reasonable, written notice of their intent to use this evidence before the trial begins. This prevents trial by ambush.
The evidence itself is not limited by the strict rules that apply during the guilt-or-innocence phase of the trial. The prosecutor can call witnesses to testify about specific prior bad acts committed by the accused, even if those acts did not result in a conviction or NJP. The purpose of this evidence is to provide the sentencing authority (the judge or panel) with a more complete picture of the accused’s character, arguing that the convicted offense is part of a larger pattern of poor behavior.
However, a military defense attorney has the right to challenge this evidence. They can cross-examine the government’s witnesses to show they are biased or that their account is inaccurate. The defense can also present its own evidence to rebut the allegations of uncharged misconduct. The military judge has the discretion to exclude the evidence if its probative value is substantially outweighed by the danger of unfair prejudice, confusion of the issues, or if it would be a waste of time. This creates a balancing test to ensure the sentencing hearing remains fair.