WASHINGTON — The Justice Department opened a sweeping probe into policing in Louisville, Ky., over the March 2020 death of Breonna Taylor, who was shot to death by police during a raid at her home, Attorney General Merrick Garland announced Monday.

Garland also announced an investigation into the tactics of the police in Minneapolis following the death of George Floyd.

The 26-year-old Taylor, an emergency medical technician, was roused from her bed by police who came through the door using a battering ram. Her boyfriend, Kenneth Walker, fired once. A no-knock warrant was approved as part of a narcotics investigation. No drugs were found at her home.

The investigation will specifically focus on whether the Louisville Metro Police Department engages in a pattern of unreasonable force, including against people engaging in peaceful activities, and will also examine whether the police department conducts unconstitutional stops, searches and seizures and whether the department illegally executes search warrants, Garland said.

The probe will also look at the training officers receive, the system in place to hold officers accountable and “assess whether LMPD engages in discriminatory conduct on the basis of race,” among other things, he said.