Bryan Ogesa (24), who works in patents, lives in a flat overlooking the murder scene in Upper Midvale Road and, along with his two brothers and a friend, tried to stop the killings armed with just a traffic cone.
He later saw the killer, who was said to be mumbling incoherently, turn a six-inch kitchen-style knife on himself before calmly walking back into the flats.
Mr Ogesa, who had initially thought there were just two victims, then said he opened a door and found a man lying face down with a knife sticking out of his back.
• Full report in Tuesday’s Jersey Evening Post
