Nicole Johnson, the sister of Dallas shooter Micah Xavier Johnson, hit out at police in a shocking rant the day before her brother shot five cops dead

The sister of Dallas killer Micah Xavier Johnson launched a shocking anti-cop rant on Facebook just a day before her brother shot five officers dead.

Nicole Johnson, from Garland, Texas, on Wednesday accused 'white people' of 'killing us off' and 'hiding behind that blue suit' before adding: 'These cops need to get a taste of the life we now fear.'

Then, in the aftermath of her brother's shooting rampage in which he was killed by a robotic bomb, she added: 'The news will say what they think but those that knew him know he wasn't like this.'

In her first message, Nicole ranted: 'To all my white or even other race friends that are on the wrong side of the law. If ur opinions are one sided or rasict or vulgar im reporting and blocking you.

'Tired of y'all tryin' [to] be on these cops side making it okay based off irrelevant info, when our own get killed over unjust s***.

'Frankly you shouldn't even try to step in that man shoes saying what he did and why it was ok.

'White people have and will continue to kill us off. The only difference is they serve the system hiding behind that blue suit and get off easy murdering civilians.

'Everything coming into the light and I for one think these cops need to get a taste of the life we now fear.'

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Johnson hit out at 'white people' accusing them of 'killing us off', adding that they 'hide behind that blue suit' before stating: 'These cops need to get a taste of the life we now fear'

After the attack Johnson seemed to defend her brother, saying that 'those that knew him know this wasn't like him' before announcing she is taking a break from social media

It appears that Johnson had become enraged at the recent killings of African Americans by police, including the shooting of Alton Sterling in Louisiana.

Following that shooting earlier this week, she penned another message which read: 'Man on life itself I'm beginning to trust law less [and] less.

'Come a [year] from now everybody will need a gun for protection. Why is it the black get the harsh treatment like damn. Makes me so mad. When he decide we had enough [and] fight back.'

Her brother, Micah, shared the same anger at police shootings and dislike of white people, telling hostage negotiators that he had specifically targeted white officers during his rampage.

Johnson's activity online suggests he was also interested in black militant groups.

On Facebook, he identified himself as a black nationalist, and his profile picture shows him wearing a dashiki and holding a clenched first in the air like a Black Panther.

Micah Johnson appears to have shared his sister's anti-cop views, telling hostage negotiators that he targeted white officers during his shooting rampage in Dallas before being killed. Pictured: Micah Xavier Johnson (right) pictured with his brother Tevin (left) and sister Nicole (center)

Johnson appears to have been a member of black militant groups online, though friends from his days in the Army reserves say he wasn't always like that

He also liked pages for several pages related to the Nation of Islam, the Black Riders Liberation Party, the New Black Panther Party and the African American Defense League.

Johnson also used to attend a gym called Academy of Combat Warrior Acts, which teaches weapons classes in addition to the traditional martial arts selection.

But his later attitudes seem a marked departure from when he served his country in Afghanistan while a member of the Army reserves.

A man who served in the same platoon as Johnson in Afghanistan said he changed after he returned from the war zone.

'When he came back from Afghanistan, he got in touch with some bad folks and went all Black Panther,' the man, who asked to remain anonymous, told Fox News.

'He did have some anger issues but never said he would hurt anyone. His shots were terrible.