Shane Gilmer, 30, killed by his crossbow-wielding neighbour Anthony Lawrence
Lawrence broke into their home by removing bricks in the attic where he waited
He fled the scene after attack and was found dead after a nationwide manhunt
Laura has since launched a campaign against the unregulated sale of crossbows
Coroner Prof Marks described crossbows as deadly and vicious weapon , adding he intended to write report addressing fact their sale is completely unregulated