We now know what killed a triathlete in Sunday's race in Pewaukee. Daniel Murry, 33, died of an accidental drowning.

Tuesday night his parents shared their grief.

Lee and Sharon Murry struggle with Dan's death. They know he battled weight problems. But training for the Pewaukee Triathlon was a turning point in Dan's life.

"It was a challenge," said Lee Murry.
 
Murry says his son Dan once weighed 400 pounds. Earlier this year he decided to compete in the Pewaukee Triathlon.
 
"Everyone was happy seeing him lose weight and he looked good," said his father.

This was Dan's first triathlon but he didn't decide to just jump into the lake. His family says he had been training for months and had lost 100 pounds.

But Dan never made it through the swim despite being a good swimmer. Investigators called it an accidental drowning but a doctor told the Murry's it was a heart attack.

Reporter Charles Benson asked, "Do you have any doubts or concerns about the event itself?"
Lee Murry said, "Either way, we realized it was an accident."

An accident that has left Dan's co-workers at Culver's stunned and saddened. His race number and bike helmet are now part of the many memories his family has.

"He was my youngest and he was the light of everybody's life," said Dan's mom.

Sharon Murry never got to see Dan at the finish line but she believes someday she will.

"He really believed and trusted in the Lord," said Sharon. "He knew where he was going to be going. We have no problems where he is. We've just got to meet him at the finish line one day."

Dan's funeral is set for Wednesday.