Barry Scheck, a co-founder of the Innocence Project, which has used DNA testing to exonerate prisoners, estimates that about eighty per cent of felonies do not involve biological evidence.

NEWYORKER: Trial by Fire

Fung's assistant, said Scheck, was a rookie, and she committed rookie errors.

CNN: SEPTEMBER 25

The questions surrounding the evidence is enough to free Simpson, said Scheck, who likened the prosecution's case to a bug in a bowl.

CNN: SEPTEMBER 25

Scheck quizzed the agent on whether the stain could have been made from a shoe.

CNN: Simpson case winding down