COSTELLO: Flags in Maryland are flying at half staff after a 28-year- old police officer is killed in what the department calls an unprovoked attack. Officer Jacai Colson was shot and killed in front of his police station on Sunday. His bosses say he had no reason to be targeted and the suspect had nothing to do with the officer. Fellow officers say Colson cannot be replaced.</s>JOHN TELETCHEA, FRATERNAL ORDER OF POLICE: Jacai had an infectious smile. He lit up a room. He was a tremendous personality that made everybody smile and wanted to be everything to everybody. He was a police officer who was a real cop's cop.</s>COSTELLO: Officer Colson would have celebrated his 29th birthday this week. The suspect in the shooting was wounded and is now recovering in the hospital. Another person was also placed under arrest. The next hour of CNN NEWSROOM, right now.</s>SEN. BERNIE SANDERS (I-VT), DEMOCRATIC PRESIDENTIAL CANDIDATE: Donald Trump is literally inciting violence with his supporters.</s>TRUMP: Isn't it great to be at a Trump rally, really? It adds excitement, doesn't it, folks?
Maryland Officer Killed in Unprovoked Attack.