Woodall 's defense team conducted its own tests on the evidence , which determined that Zain had used flawed blood - typing methods in tying the semen to Woodall .
Woodall was the first person to be exonerated after being convicted due to testimony by lab technician Fred Zain .
person 's defense team conducted its own tests on the evidence , which determined that Zain had used flawed blood - typing methods in tying the semen to person .
Woodall was the first person to be exonerated after being convicted due to testimony by lab technician Fred Zain .