An attorney who prosecuted Casey Anthony is back in a courtroom in central Florida _ only this time he is standing in as defense counsel, for his son.

Jeff Ashton, who retired after Anthony was cleared of killing her 2-year-old daughter, is representing his 21-year-old son, Alexander Ashton, on DUI charges. A jury was selected Monday. The Seminole County trial is set to begin Thursday.

The Orlando Sentinel (http://thesent.nl/ysWMF0 ) reports Ashton wrote in a statement he's defending his son because he believes in his "right to have his day in court like any other citizen."

Alexander Ashton was reportedly arrested Oct. 25 with a breath-alcohol test registering twice the legal limit.

Anthony, the Orlando mother acquitted of murder but convicted of lying to authorities, was released from jail in July.