White officer Matt Kenny, a 12-year veteran of the force, shot the biracial teenager on the evening of 6 March.
Officer Thomas, one of the few black officers on the force, shot himself in the head in October 1998.
On Saturday, a gunman in the uniform of a government-backed militia force shot dead two British soldiers in Helmand district in the southwest.
Between 1995 and 2001, the Peruvian air force shot down or forced down at least 38 aircraft involved in drug trafficking and seized another dozen on the ground.
On 7 January, the Yugoslav Air Force shot down a European Community Monitor Mission helicopter.
Security forces shoot six people.
Activists claim that the government frequently blames "armed gangs" for gunfire when the security forces shoot protesters.
Will U.S.-supplied Egyptian security forces shoot unarmed demonstrators?
And just three days before Malaysia Airlines flight MH17 is shot down over eastern Ukraine, rebel forces shoot down a Ukrainian military transport plane.
Israeli forces shot the drone down.
Residents say security forces shot him, too.
