ST. LOUIS — Damien Nash had just come home from a charity basketball game he'd organized in his brother's honor when he collapsed in front of his wife and 7-month-old girl.
The Denver Broncos' running back died Saturday, and the cause remained unclear Sunday, but his grieving mother knows what she must do.
After one son's death and a heart ailment that caused another son to require a transplant last year, Kim Nash is taking her daughter to a cardiologist next week.
"My son," she told The Associated Press amid sobs, "is giving me the strength right now to talk."
Damien Nash collapsed in his suburban St. Louis home after returning by limousine with his wife, Judy Nash, and their daughter from a game at his high school to benefit The Darris Nash Find a Heart Foundation. The organization raises money for heart transplant research.
The 24-year-old player was taken by ambulance to Christian Hospital Northeast, where he was pronounced dead. The hospital's nursing supervisor, Maria St. George, told the AP the hospital dispatched an ambulance as soon as it received the call.
The St. Louis County Medical Examiner's Office said results of Sunday's autopsy may not be known for days, even weeks.
"I didn't see anything to point to a cause of death," Dr. Kamal Sabharwal, the medical examiner, said late Sunday.
He said he was waiting on lab results to check for drugs or alcohol and a look at tissue sections. He's also asked a forensic pathologist who specializes in hearts to look at Nash's heart.
Dr. Gregory Ewald, a cardiologist, treated 25-year-old Darris Nash and said he had a weakened heart muscle condition known as dilated cardiomyopathy. The ailment can be caused by a viral infection, inflammation or other causes. Darris Nash became so ill he needed a mechanical device to support his circulation until he could get a transplant.
Ewald said some cardiomyopathy conditions run in families. He said he never met Damien Nash, but "the fact that Damien was doing high-level athletics may indicate that was not the problem."
The death comes less than two months after the still unsolved slaying of Broncos teammate Darrent Williams. Damien Nash's agent, David Canter, said the Broncos were trying to contact teammates, who have scattered for the offseason. Funeral arrangements were not yet set.