The apprentice plumber said the four girls had been "laughing and joking" in the back seat and singing along to music in the moments before the fatal crash.
On Friday, the Belfast Amalgamated Committee of the Apprentice Boys said there had been an "absence of attention on those who paid the ultimate price for our individual freedoms and on those who ably defended the civil and religious liberties that we all cherish".
Michelle Dewberry, winner of the BBC television show The Apprentice last year, said she saw someone who had collapsed being resuscitated after about four miles.