New York: Undercover detective who fired first shot testifies in police killing in Queens.
Maryland: Woman with knives shot by police officer.
Michigan: Teen girl wounded outside high school; shooter killed self.
Texas: Student shoots self at school.
Arizona: Border agent who killed migrant back on duty.
California: Corvallis police training more rigorous than most.
Virginia: Training future Charlottesville police.
California: When police dog, pepper balls and bean bag gun fail.
Georgia: Police shooting kills one. Second suspect arrested after robbery in South Hall.
Minnesota: Officer hit by fellow officer’s car during foot chase.
