DALLAS -

(AP) - Police Chief David Brown has changed department policy for officer-involved shootings following the firing of an officer who shot a mentally ill man last month.
    
The policy now stipulates that Dallas officers do not have to provide a statement within 72 hours of a shooting. The intention is to allow an officer to rest before recounting a traumatic event.
    
The Dallas Morning News reports (http://dallasne.ws/17W5y3r ) that an officer previously gave a statement within hours of a shooting. Brown contends a premature statement can be clouded by the emotion that comes with an officer firing on another person.
    
Brown dismissed officer Cardan Spencer after he shot the mentally ill man. Surveillance video showed the man was not a threat to Spencer or his partner, Christopher Watson, whose statement about the encounter was contradicted by the video.