Kentucky: Six-year-old son of officer accidentally shoots, kills himself.
Canada: Killer of two Mounties turns self in.
Canada: Police officer memorial unveiled.
South Carolina: Suspect removes handcuffs, tasers officer.
Texas: Police blame rap song for fatal gang shooting.
Texas: Video: Courthouse shooting
Virginia: Scout snipers break in new rifles.
Florida: Deputy who killed man in pursuit cleared.
Ohio: Police officer shoots, kills man with a gun in Barberton.
Maryland: Officer shoots knife-wielding man.