Duncan, Oklahoma: The parents of two of the boys accused of the random drive-by shooting murder of Australian baseballer Chris Lane believe their sons are innocent, as the 22-year-old's heartbroken girlfriend says she doesn't care what happens to the ''evil people'' who gunned him down.

‘‘I don’t believe he was there because of the time frame,’’ one of the boy’s mothers told reporters outside the Stephens County Courthouse in Duncan, Oklahoma, on Monday.

‘‘I don’t believe my son did it,’’ the father of another boy said.The boys - aged 15, 16 and 17 - were scheduled to be brought to the courthouse on Monday afternoon (about 4.30am Tuesday AEST), but it was pushed back a day.