Witnesses of auto crashes usually have significant reactions to the threat of injury and death. This is particularly true if the witness was the driving the vehicle that was involved in the accident. The experience of the reactions may not demonstrate to the witness, that there is the capacity to develop PTS or PTSD and /or other types of reactive states that can be triggered by any sensory source. The longer the period following the crash incident is before the witness gets help to prepare to be an effective witness, the more likely the person will experience a negative mental and/or emotional health impact. BSW is a brain-based technique, so the BSW Witness Preparation program would benefit the witness even more and needs to start immediately. If the incident caused any brain damage, the BSW technique can be quite beneficial for the witness.