heartbreaking 5th dallas law enforcement officer pronounce dead today dallas police association say 5th police officer die ambush thursday night cbsdfw cbsdfw july 2016the dead sniper identity yet release break police source say ambush shoot suspect shoot standoff pic.twitter.com/lgjoghuorj cbsdfw cbsdfw july 2016the first dallas police officer kill sniper fire last night black live matter protest 43 year old officer brent thompson dart id 's slay officer brent thompson 43. first dart officer kill line duty https //t.co/pbdha8nfqm pic.twitter.com/zcmwtgbytl fox news fox4 july 2016here heartwarming quote officer thompson share andrea lucia cbs 11 news `` constantly look different ways serve department `` -fallen dart officer brent thompson https //t.co/adbgwqmc77 cbsdfw andrea lucia cbs11andrea july 2016mark hughes brother cory hughes one black live matter protest organizers question police released.this man long suspect mark hughes release custody shoot https //t.co/jmmcm5zull pic.twitter.com/gbflupy6sx cbsdfw cbsdfw july 2016god bless brave men women uniform courageously face cowards hateful people like every day encourage tweet someone understand cop protest valiantly defend right free speech n't forget every officer street tonight dallas protect right people demonstrate peacefully leigh leighdow july 2016several people protest dallas say cop cool night even save live civilians thank dallaspd baylor barbee baylorbarbee july 2016 break update 5th dallas police officer died…sniper dead self-inflicted gun shot…first dead police officer identified… person interest release question