The Scofield Bible Commentary, by Cyrus Ingerson Scofield, [1917], at sacred-texts.com
voice
(See Scofield) - (Act 9:7).
sins
Sin
(See Scofield) - (Rom 3:23).
when I was
That is, probably on his first visit to Jerusalem after his conversion.
freedom
Citizenship.
was free born
Am a Roman born, that is, of a father who had obtained citizenship.
examined him
Or, tortured him.