For the past year, Yvone Redmon's mind has been filed with nothing but questions:

What happened? Why? Why didn't anyone stop to help? Why hasn't anyone come forward?

On July 7, 2007, Roy and Mary Ann Redmon were on their motorcycle, traveling along I-15 near Kanosh. They were en route to Las Vegas for the evening before continuing to their home in California when they ran into near blackout conditions caused by thick smoke from the massive Milford Flat fire. The wildfire was certified as the largest in Utah history after scorching 363,000 acres.

While on their motorcycle in the middle of the thick smoke, the Redmons were hit from behind by a driver who apparently could not see them. After they were down, it is believed that Mary Ann was leaned over trying to administer help to her husband when the couple was hit again. The Redmons were hit by possibly two or three cars, daughter Yvone Redmon said.

During the chaotic situation, the driver thought to have initially hit the couple pulled over a short time later and told a firefighter who was fighting part of the wildfire near the road that he thought he may have just hit someone. The firefighter told the man to stand next to his firetruck and wait for police to arrive. But by the time the firefighter had finished with what he was doing and turned around, the man was gone.

A police sketch based on the firefighter's recollection of what the driver looked like and pleas to the public for information have been all investigators have had to go on.

Today, all leads in the case have gone dry. Not one witness has stepped forward — something that troubles Yvone and her family who know that someone out there knows something.

"We're in a much better place than we were 12 months ago, but there are still so many unanswered questions," she said. "We just want answers. We want to know what happened. We want to locate this gentleman to find out what he saw, what created this accident. We want our questions answered so we can move forward. It's been devastating."

Redmon said she understands that what happened was a tragic accident. But she has a hard time comprehending what happened after the accident.

"Why didn't he go to the nearest police station or call and report what he saw? What type of person could walk every day through life and not even think about what happened? Someone out there knows this man and someone knows what happened. My parents need to be honored and respected," she said.

Roy Redmon, 68, was a retired sheriff's deputy. He and Mary Ann, 65, were from Rowland Heights, Calif. They are survived by five children, nine grandchildren and two great-grandchildren. The grandchildren are the ones who have been most vocal about asking why the accident happened, Yvone Redmon said.