The mother of a slain police officer says the upcoming execution of his ‘killer’ will bring her peace – despite more than 2,000 activists forming a huge protest in the streets against the conviction. Troy Davis, 42, is set to be executed by lethal injection next Wednesday after he was convicted of killing police officer Mark MacPhail, who was shot dead in Savannah, Georgia, in 1989. Continue reading after the jump. @capriSUNshine