Lieutenant Allan James is a rival law enforcement official to former Captain Donald Cragen.
History[]
Fifteen years before the trial of Darius Parker, Cragen had James stripped of his command post as he did not see James as fit for command.
To get back at Cragen, he assisted in giving illegal intel on the Special Victims Unit to rape and murder defendant Darius Parker and his defense attorney Matthew Braden to discredit the squad and ruin them enough for a not guilty verdict and possibly get Cragen off the force. Not only was it successful, but when Cragen had a confrontation with James, he revealed he was retiring and the defamation and judicial tampering were a last strike out of revenge.
With an inability to gather a case and much political danger in an investigation, James was never found out or charged. Fortunately, his plans for revenge fell through as Cragen maintained his rank before his own retirement years later. (SVU: "Screwed")