Arizona: Sgt. killed in SWAT exercise was highly decorated.
Related: SWAT team exercise turns deadly
Related: Fallen SWAT officer rescued couple in fire
D.C.: With new device, police shake, rattle and roll. D.C.'s high-tech 'rumbler' siren emits a low-frequency vibe you can feel.
California: Officer shoots, kills motorist after collision in Oakley
Alabama: SWAT Training takes officers to new level.
Alabama: Tasers tools of compliance, not punishment
New York: Police knew details of missing guns . Albany chief has claimed no records of assault weapons illegally obtained by officers.
Texas: Houston police officer shot by suspect in handcuffs
Delaware: Police end siege with tear gas
Virginia: Emergency training exercise at school.
Dallas: Let's trust Dallas police to weigh applicants' past drug use