The police killed a 21-year-old man in Pitsea on Saturday.
A yesterday's forensic autopsy revealed the cause of death when a police cordon remained in place on Little Garth on Pitsea Road.
On Saturday, July 7, just before 8:45 pm, officials were called to report an injured man, but despite all the efforts of the paramedics, the man died a short time later at Basildon Hospital.
Detective Inspector Stuart Truss of the Kent and Essex Serious Crime Directorate said: "We believe this was a targeted and isolated incident and there is no risk to the general public.
"Our investigation is progressing well and we continue to conduct investigations at the point where a cordon is present.
"For this reason, I expect parts of Pitsea Road to be closed until the early hours of the morning and until the afternoon.
"If you normally use this route to get to work, I advise you to plan in advance and choose a different route.
"We continue to appeal for information, and my team needs to talk to anyone who has seen or heard something, has CCTV or drives in the area, and has dash cam shots.
"It does not matter how insignificant you think the information you have is we have to talk to you."
If you have any information, call Essex Police on 101, citing incident 1418 of 07/07 or email email@example.com
Alternatively you can contact Crimestoppers anonymously on 0800 555 111.