NEW : Amada Knox and her former boyfriend ` ` ' for nothing , '' a prosecutor in their defense says . Knox and others were convicted in 2012 of killing Briton Meredith Kercher . And they have killed for nothing . Their attorneys argue police made mistakes and evidence does not support their convictions . Amanda Knox is scheduled to speak on Monday .
NEW : Amada Knox and her former boyfriend ` ` ' for nothing , '' a prosecutor in their defense says . Knox and others were convicted in 2012 of killing Briton Meredith Kercher . Their attorneys argue police made mistakes and evidence does not support their convictions . Amanda Knox is scheduled to speak on Monday .