Mexico: 13 Killed by Gunman at Fake Checkpoint

Feature
July 19, 2011

Police escorting State Security Secretary Francisco Cordova Celaya were ambushed in the state of Sinaloa by gunmen, allegedly from an organized crime group, leaving 12 policemen and one civilian dead.

http://insightcrime.org/insight-latest-news/item/1246-12-mexican-police-1-civilian-killed-in-sinaloa-ambush