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The family of Alton Sterling, the man killed by police in the US city of Baton Rouge, Louisiana, has called for justice.
Sandra Sterling, the aunt of Alton, spoke at a rally in Dallas, Texas, and told reporters: "One thing I want to say is all lives matter. We just want justice. We don't want it to get off like those other mother's sons, and the police got off there. We need justice.
"Maybe we need to change the police, maybe we need to change the policies and re-train these officers. And these things shouldn't be happening, but in reality it does."
She said her family came to Texas because "when I saw what happened here, I just had to come, let them know we do not promote violence. That had nothing to do with us".
The suspect who killed five police officers in Dallas last week had prepared a larger assault on law enforcement, the city's police chief said.
Police Chief David Brown told CNN that authorities are "convinced" Micah Johnson had other plans, citing evidence gathered from the suspect's home that showed he had practiced with explosives.
Mr Brown said the recent deaths of African Americans at the hands of police in Minnesota and Louisiana led the Texas shooter to "fast track" his plans.
The head of Dallas police has insisted that he was right to blow up a gunman using a bomb carried by a robot.
Chief David Brown said the decision had saved lives as shooter Micah Johnson was intending to attack other officers after a spree that saw five police killed and seven others wounded.
The force's decision to kill a suspect with a remotely controlled-bomb is thought to mark a first for US police.
Mr Brown told CNN that he had asked his staff "use their imaginations" to disable Mr Johnson after talks aimed at bringing an end to a standoff failed.
"Without our actions, he would have hurt more officers," he said.
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The father of Dallas shooting victim police officer Patrick Zamarripa said he was 'angry' about his son's death, but called for more unity.
James Johnson, whose son Micah shot and killed five white police officers, said: "I love my son with all my heart but I hate what he did."