It's the key question in the men's marathon tonight: Will the ghost of Sammy Wanjiru be felt?
When the brilliant 21-year-old broke the tape at the finish line of the marathon in Beijing in 2008, he made the sign of the cross and sank to his knees. It was a moment like that of the All Blacks winning, at last, the 2011 Rugby World Cup.
A long, puzzling and damaging drought had ended. Kenya, the mass production masters of long distance athletics, finally had an Olympic marathon champion to acclaim.
Wanjiru shaped as a marathon giant. After winning at Beijing in record time, he also won the London and Chicago marathons, both in record times.
But he also set more dubious records. He was the only Olympic marathon champion to be arrested after brandishing an AK47 assault rifle at his wife, a maid and a security guard in 2010. Last year he became the only Olympic marathon champion to be killed after his wife caught him in bed with another woman - he apparently jumped from a first-floor balcony in a desperate attempt to stop his wife leaving his luxury house near Nairobi.