Fired Minneapolis police officers Alexander Kueng, 26, Thomas Lane, 37, and Tou Thao, 34, are due to appear in court this afternoon to face charges filed yesterday of aiding and abetting former officer Derek Chauvin in the murder of George Floyd on May 25.

The men are at the Hennepin County Jail. Derek Chauvin was charged yesterday with second degree murder after Minnesota attorney general Keith Ellison took over the case, an upgrade of the third degree murder charge brought last week by the Hennepin County prosecutor.

Chauvin is detained in state prison.

Just before the scheduled court appearance today, a memorial service will begin in Minneapolis for George Floyd. The four officers were fired on May 26, the day after Chauvin kneeled on 46-year-old Floyd’s neck as he was pinned to the street, for almost nine minutes. The death has been ruled a homicide by two autopsies, one official, one private carried out at the request of Floyd’s family.

Protests continue across the country, with many demonstrators echoing some of Floyd’s dying words, “I can’t breathe” and staging die-ins for eight minutes 46 seconds, the length of time Chauvin, who is white, kneeled on the African-American man’s neck during an arrest.

Kueng was seen on video taken by a witness pressing on Floyd’s back, while Lane pinned his legs. Thao stood alongside and warned bystanders against intervening.