NORWALK -- Michael Skakel told a therapy group at the Elan School in Maine that his brother had stolen his girlfriend and fooled around with her sexually, and that he truly didn't know whether he - Michael - had killed Martha Moxley, a witness testified Friday. "He didn't know what happened that night," said Elizabeth Arnold, a former classmate of Skakel's at Elan. "He was very drunk and had some sort of a blackout. He didn't know if he had done it or if his brother [Tommy] had done it." Arnold then offered the strongest testimony the jury has heard...