D is for the Dallas Police shooting

July 7, 2016:

A man ambushed and fired upon a group of police officers on Main Street in Dallas, Texas, killing five officers and injuring nine others.  The shooting happened at the end of a protest against police killings of unarmed men.  The shooter had several guns, including one semi-automatic.  After the shooting on Main Street the man barricaded himself inside El Centro College.  You many remember this shooting incident because the police sent in a robot, a remote control bomb detonation robot, to eventually kill the shooter.

The officers killed were identified as:

DPD Senior Cpl. Lorne Ahrens, age 48, who had been with the department since 2002.
DPD Officer Michael Krol, 40, who had been with the department since 2007.
DPD Sgt. Michael Smith, 55, a former Army Ranger[51] who had been with the department since 1989.
DART (Dallas Area Rapid Transit) Officer Brent Thompson, 43, a former Marine who had been with the department since 2009. Thompson was the first DART officer to be killed in the line of duty since the department's inception in 1989.
DPD Officer Patricio "Patrick" Zamarripa, 32, a former Navy sailor and Iraq War veteran who had been with the department since 2011.

This was the deadliest single incident for law enforcement officers in the United States since the September 11 attacks.

I retrieved this information for the Wikipedia entry for this shooting.

Viridian