Meanwhile, some 150 demonstrators returned to the streets of the St Louis suburb of Ferguson at sunset Friday to demand justice for the August 9 death of Michael Brown.
Funeral services for the 18-year-old — whose shooting in broad daylight has renewed a national debate about race and law enforcement in America — are set for Monday.
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The police department in Glendale, another St Louis suburb, said on Friday it had suspended one of its officers who had expressed contempt for the Ferguson protesters on his Facebook account.
“I’m sick of these protesters. You are a burden on society and a blight on the community,” wrote Michael Pappert, in one of at least five posts that have gone up since Sunday.
“These protesters should have been put down like a rabid dog the first night,” he added.
In a reference to the Boston Marathon bombing, he also wrote: “Where is a Muslim with a backpack when you need them.”
“The matter is being taken very seriously and a thorough internal investigation will be conducted to determine why the posts were made,” it said.
It stressed that Officer Pappert’s posts were “absolutely” not shared by the Glendale police or city government. The suburb of 6000 is 97 per cent white.
Press photographers recognised Officer Pappert as one of hundreds of St Louis area police officers called into Ferguson as crowd-control reinforcements.
One photographer remembered seeing him threatening journalists with a night stick. “He was ready to swing at us,” he recalled.
On Wednesday, Ray Albers, a police lieutenant from another St Louis suburb, St Ann, was suspended after he pointed a semiautomatic assault rifle at Ferguson protesters and, using obscene language, threatened to kill them.
His conduct was captured in two videos that promptly went viral on YouTube. Meanwhile, St Louis County Police said Friday it was opening an internal investigation into an officer assigned to Ferguson who, in a 2012 YouTube video, styled himself as a ruthless killer.
“I personally believe in Jesus Christ as my lord saviour, but I’m also a killer,” said Dan Page, a 35-year veteran of the force, who was speaking to a group called the Oath Keepers of St Louis and St Charles.
“And if I need to, I’ll kill a whole bunch more. If you don’t want to get killed, don’t show up in front of me.
It’s that simple,” he said.
“I’m into diversity — I kill everybody. I don’t care,” added Page, who also made disparaging remarks about President Barack Obama, the US Supreme Court, Muslims and homosexuals.
St Louis County police chief Jon Belmar told the St Louis Post-Dispatch newspaper he was “deeply disturbed” by Officer Page’s remarks about killing.
Officer Page — who allegedly shoved a CNN anchor in the middle of a live report from Ferguson — has been taken off police work until the internal review determines whether he should be suspended, Chief Belmar said.