Friends of Joseph Parker's boxing trainer died in the Las Vegas attack.
Kevin Barry in in Las Vegas and said he sat in shock when he found out one of his son's closest friends was shot and killed.
He said two of his wife's friends were shot, but survived the attack.
"We had one of my son's closest friends ... one of his best mates was shot and killed during the concert. So it has touched us in a very real way. And I think when you look at the number of people who have been injured in this catastrophic event I think there is going to be a lot more people that we know when the names come out."
Barry said the horror reminds him of 911.
"I had had been home for little over a week when 911 happened and this had a similar feeling to me. I was very keen this morning to give my wife a big hug and kiss my son when he woke up.
LISTEN ABOVE AS KEVIN BARRY SPEAKS WITH MARK WATSON