The jury deadlocked 4 to 2 last November in the trial of one rape case.
He was tried a second time on five of the remaining charges, and the jury deadlocked.
Both juries deadlocked at 9 to 3 on the more serious charges.
The jury deadlocked, though the vote was 8-4 for conviction.
In 1994, a first jury deadlocked on his mental competency, but a second found him able to stand trial.
The jury deadlocked, and in the end the charges were dismissed.
But she also set a date for a new trial on the three charges against him that left the jury deadlocked.
In a separate case, the jury deadlocked with 8 of 12 jurors.
Two juries, one for each man, deadlocked in the brothers' first trial last year.
The first trial ended last summer when the jury deadlocked on all three men.