NEW : Michael McLendon left behind note describing ill will he harbored toward family . NEW : A man who was found dead in a home with his wife and two children has been identified as the suspect in an alleged murder-suicide at their home. McLendon killed 10 people in two towns before killing himself . McLendon unhappy with failed efforts to become Marine , police officer , police say .
NEW : Michael McLendon left behind note describing ill will he harbored toward family . NEW : Shooter was going to continue `` until he was stopped , '' investigator says . McLendon killed 10 people in two towns before killing himself . McLendon unhappy with failed efforts to become Marine , police officer , police say .