DALLAS, Tex. (AP) -

Dallas Police Chief David Brown, who oversaw the response to a July sniper attack that killed five officers, has announced his retirement.

Brown issued a statement Thursday saying he will retire October 22 after 33 years with Dallas police. He was not immediately available for additional comment.

He says he was prompted to become an officers in 1983 by a crack cocaine epidemic in a Dallas neighborhood. He was named police chief in 2010.

He's drawn criticism from Dallas police unions for not doing enough to retain many officers who have left for better pay elsewhere. But his leadership following the July 7 shooting deaths of officers drew praise from President Barack Obama and others.