ST. PAUL, Minn. (AP) -- Dozens of people gathered in front of the Minnesota governor's mansion to demand accountability for police officers, days before a former Minneapolis officer is set to go on trial in the death of George Floyd.

Many of the roughly 150 people who demonstrated in Minnesota were relatives of others who died in encounters with police. Similar protests were being organized in cities around the country ahead of the planned trial of Derek Chauvin.

Floyd died after Chauvin, who is white, pressed his knee onto Floyd's neck even though the Black man said he couldn't breathe.

Jury selection begins Monday in Chauvin's trial.

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LOOK: 50 essential civil rights speeches

Many of the speakers had a lifetime commitment to human rights, but one tried to silence an activist lobbying for voting rights, before later signing off on major civil rights legislation. Several fought for freedom for more than one oppressed group.

Keep reading to discover 50 essential civil rights speeches.