But Mr Brauchler said: "This was when he lost his last battle with biology, his last great battle of falling in love.His girlfriend doesn't want a long-term relationship with him." On March 17, 2012, they were at an Irish bar and another man approached the girl.
He described how the pair would discuss subjects including neuroscience and cannibalism, and Holmes' pet gerbil Lucifer.
As his trial opened at Arapahoe County Court, seven miles south of the cinema, Holmes sat silently at a table with his legal team 20ft from the relatives of victims who have called for him to be put to death by lethal injection.
He was dressed casually in a pale blue open-necked shirt and grey slacks, and wore reddish oval-shaped spectacles.
He grew up in a suburb where his family attended the Lutheran church and "Jimmy" excelled at school, getting a reputation among fellow students as a "brainiac" who also loved football.
He was, they thought, a "bit odd" but not deranged.