Riddle: Week of 3/2-3/8

Last week's answer:
"Oil."

This week's riddle is:
"A man was to be sentenced, and the judge told him, "You may make a statement. If it is true, I'll sentence you to four years in prison. If it is false, I'll sentence you to six years in prison." After the man made his statement, the judge decided to let him go free. What did the man say?"

Riddle compliments of: http://www.increasebrainpower.com/hard-riddles.html