for the prosecution said the police were present forensic architecture a research unit at goldsmiths university in london has now answered that question by matching material from eleven security cameras to precisely time coded police dispatch recordings they corroborated what prosecution witnesses said they were saying from the very beginning that the police was present on the scene and not intervene in the before and that we found out that they arrived at the scene about five minutes before the murder took place the defense tried to have the analysis thrown out but the courts deemed it admirable we can see. groups of people attacking somebody who is obviously was at the time of the of the stabbing. two policemen being at the scene in five to ten meters away having so the killer passes right through them right in front of the two police officers who stood here evidently hadn't realized what happened because of the stabbing they tried to arrest the victim rather than the killer it's only because told them he'd been stabbed showed them his wounds and pointed to his killer but the killer was a res