A REVELLER who was shot dead at a blood-soaked park rave has been named by cops, as another partygoer was arrested.
Sam Brown, 28, was killed at the late-night gathering in Walthamstow, East London, in the early hours of Sunday morning.
Police were called to the party of up to 100 people in Cheney Row Park shortly after midnight on Saturday.
Partygoers ran for cover as multiple shots were fired at around 12.35am, before cops secured the crime scene.
A short time later, two men self-presented themselves at a nearby hospital.
Sam Brown, of Waltham Forest, had sustained critical gunshot wounds at the horror event.
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He later succumbed to his injuries and passed away in hospital, The Metropolitan Police said.
His family have been informed and are being supported by specialist officers. A post-mortem examination and formal identification will be arranged in due course.
The second of the walking wounded was a man in his 30s suffering from stab injuries.
He was later discharged from hospital before the force arrested him in connection with the incident.
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The man remains in custody as cops launched a murder investigation and urgently appealed for witnesses to come forward.
The Met have warned locals there will be vehicle and pedestrian disruption over the next few days.
Horrified residents revealed they expected "trouble" after swathes of revellers descended on Cheney Row Park.
DCI Kelly Allen of the Specialist Crime unit, heading up the probe, said: "My heart goes out to the family of Sam, who has lost his life in this reckless act of violence.
"I can assure them of my total dedication, and that of my team, to ensuring that they get justice.
"I believe there were 50 to 100 people gathered in and around Cheney Row Park at the time of the shooting with music playing.
"I urgently need to speak with everyone who was at that event – even if you do not believe you saw anything significant, you need to come forward and speak with officers.
"There will have been footage and images captured at the event, and we need to see these. Please ensure that all such material is saved – we will provide a link for it to be uploaded shortly.
"To anyone considering whether or not to come forward to police, I ask you to put yourself in the position of the victim’s grieving mother and father this morning. They deserve answers.
"And whoever took a gun to a gathering like this does not deserve your protection, nor do they deserve to be free to inflict further harm on others. Please do the right thing and make contact today."
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Anyone with information or any witnesses yet to speak with police are asked to call 101, quoting reference 267/24jul.
It comes as cops launched a murder probe after a man in his 50s was stabbed to death in an Ealing pub last night.