"I would urge young people who were present at the Greenvale last night to please get in touch with MIT detectives".
Flowers outside the Greenvale Hotel in Cookstown, Co.
However, she could see "people laughing with no idea what was going on".
He says police "need people to come forward and tell us what happened last night. And that may have explained why there was some reports of fighting", said Hamilton.
Mr Hamilton added: "We are of an open mind.it looks like a crowd of young people, a large crowd, pushing up against the front of the hotel to get in to this event".
"Unfortunately, a friend of mine who I had seen in the line and chatted to minutes beforehand has died".
The incident "traumatized" the teenager and made him reconsider if he would go out ever again: "It was the worst thing I've ever experienced, really frightening".
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"Two of my friends fell to the ground, I tried to pull them up but at that point there was no room for them to even come back up, so I started screaming at the top of my lungs "my friends are on the ground, my friends have fainted, my friends can't breathe, move back". It felt like this went on forever but eventually I felt bodies being dragged over me and beside me.
After she was pulled out, she contacted her parents to tell them she was OK and then began to understand what had happened.
Relatives, friends and teachers have paid tribute to the three who died.
Eboney Johnston (16) was outside the Greenvale Hotel on St Patrick's night waiting to enter a disco.
Police have also urged young people who were queuing or in the vehicle park of the hotel on St Patrick's night to come forward to help them with their investigation. "My heart breaks for their poor families".
Police appealed for parents to collect their children from the scene.
Police said it appeared that people had fallen and then been fatally injured, but are still investigating the cause.
"My two boys were there so I rang them, shaking and thankfully got them both", she said.
Sinn Fein vice president Michelle O'Neill also tweeted: "Heartbreaking news coming from Cookstown tonight".
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Be warned, though: devices flashed manually won't get OTA updates to later beta releases , or indeed to the final version. Starting with Android Q , users will have an option to provide location access to an app only while it is being used.