The US Justice Department charged four police officers on Thursday over the death of Breonna Taylor, a Black woman killed in a botched 2020 raid on her home in Louisville, Kentucky.

Attorney General Merrick Garland said the officers face federal charges of civil rights offences, unlawful conspiracy, making false statements unconstitutional use of force and obstruction.

"We allege that these offences resulted in Miss Taylor's death," Garland said. "Breonna Taylor should be alive today".

The deaths of Taylor and George Floyd, a 46-year-old Black man who was murdered by a white police officer in Minneapolis in May 2020, became the focus of a wave of mass protests in the United States and beyond against racial injustice and police brutality.

The 26-year-old Taylor and her boyfriend, Kenneth Walker, were sleeping in her apartment around midnight on March 13, 2020 when they heard a noise at the door.
Walker, believing it was a break-in, fired his gun, wounding one police officer.

Police, who had obtained a controversial no-knock warrant to make a drug arrest, fired more than 30 shots back, mortally wounding Taylor.

Garland said three of the Louisville police officers – Joshua Jaynes, 45, Kyle Meany, 35, and Kelly Goodlett – were involved in the falsification of a search warrant in a drug trafficking case against Taylor's ex-boyfriend.

They are accused of violating Taylor's rights by seeking a warrant to search her home when they knew they lacked probable cause.

"We allege that the defendants knew that the affidavit in support of that warrant contained false and misleading information and that it omitted material information," Garland said.

He added that the officers also allegedly "took steps to cover up their unlawful conduct after Miss Taylor was killed".

The fourth police officer, Brett Hankison, was charged with using excessive force by opening fire wildly during the raid which left Taylor dead.

Ben Crump, a civil rights attorney who represented Taylor's family, welcomed the charges filed against the officers.

"Today was a huge step toward justice," Crump said in a statement.

He said he hopes it "sends a message to all other involved officers that it is time to stop covering up and time to accept responsibility for their roles in causing the death of an innocent, beautiful young Black woman". (AFP)