Officer accused of abusing his own K-9 [Video]

A motive for the crime is still unclear, investigators said. (WPXI, POLICE HANDOUT, CNN)

The news shook financial markets around the world, and the Dow plunged 900 points. (CNN, POOL, U.S. BUREAU OF ENGRAVING)

Secret Service hosted a briefing for transparency on the attempted assassination. (CNN, AFP VIA GETTY IMAGES, GETTY IMAGES, DEMOCRATIC NATIONAL CONVENTION)

The three deputies were shot at a house in Eustis, Florida, on Friday night. (WFTV)