Parker lives with the Barrys in a gated suburban community in Las Vegas about 20 minutes' drive from The Strip where the shooting occurred.
Barry added: "It has touched us in a very real way. When you look at the people who have been injured in this catastrophic event, I think there are going to be a lot more people that we know once the names come out.
"I got up this morning and there were a lot of concerned messages from New Zealand and different parts of America. I turned the television on and sat there almost in shock. I sat there with a cup of coffee - I couldn't eat my breakfast. It made me sick. The last time I felt like that was in 9-11.
"It's times like this that you have to appreciate life and appreciate that everything can change very quickly."
The shooting happened at a concert near the Mandalay Bay Casino and Barry said he knew the area well.
"The Mandalay Bay and the Bellagio are my two favourite casinos here in Las Vegas," he said. "People may remember when David Tua fought Lennox Lewis back in November 2000, that it was at the Mandalay Bay. It has always been a casino that I have had fond memories of.
"I've walked up and down that area many times in the 14 years we've lived here."
*Listen to the full interview with Kevin Barry on Radio Sport just after 4pm today.