One way, he said, is to have an investigator follow the injured party and record the person's activities on videotape.
The accounts of this accuser's first description of the suspects, however, are ambiguous: the two investigators who interviewed her at home recorded the conversation differently.
The Aisenbergs were unaware that, for a period of 79 days, investigators recorded over 2,600 separate conversations on 55 different audio tapes.
It is unknown exactly how many serious and fatal crashes are caused by sleepy drivers because investigator often do not record sleepiness as a possible cause of an accident.
In addition to the activities of the undercover officer, who was not identified, investigators used wiretaps extensively and secretly recorded meetings with carting executives.
Then the investigator records the relative height of F2 to F4 against F3.
The investigators are recording the dimensions and layout of rooms and identifying areas where weapons or documents could potentially be hidden.
And the world press, as well as the investigators, have recorded the stories of scores of victims and survivors.
The investigators record the regions of the brain that are active during each of these conditions, and then subtract the activity.
When the Insurance Department began orchestrating crashes, investigators recorded the action with four hidden cameras inside the bus and numerous cameras positioned in surrounding buildings.