Kenny Woods experienced firsthand one of the primary reasons for wrongful arrests: eyewitness misidentification. He has a simple theory how cops could twice wrongly identify him as a killer from photos and a cop's split-second glance at the real culprit.
"I guess they think all black people look alike," Woods said.
Experts say that's sort of true, but the phenomenon is not rooted in racism.
"Social science of the past 30 years tells us that cross-racial identifications can be less accurate than identifications within the same racial group," said Marissa Boyers Bluestine, legal director of the Pennsylvania Innocence Project.