Sentencing will take place in eight weeks, according to the judge.
The jury reached their verdict after about 10 hours of deliberations over two days.
George Floyd died in May 2020.
Minneapolis Police Officer Derek Chauvin, 45, was recorded on video by bystanders as he pinned his knee on Floyd’s neck for more than nine minutes on May 25, 2020. Floyd was later pronounced dead. Chauvin was fired.
Chauvin was charged with second-degree unintentional murder, third-degree murder and second-degree manslaughter.
Prosecutors said Floyd, who was 46, died of asphyxia from low oxygen when Chauvin knelt on his neck as former officers J. Alexander Kueng knelt on his buttock/thigh area and Thomas Lane knelt and held his legs, the Minneapolis Star-Tribune reports. Former officer Tou Thao kept bystanders at bay.
Floyd was being arrested for allegedly using a counterfeit $20 bill to buy cigarettes at a store in south Minneapolis.
Floyd died on May 25, 2020. Chauvin was arrested on May 29, 2020.
The other officers at the scene -- Thao, Kueng and Lane -- were each charged with aiding and abetting second-degree murder while committing a felony, and with aiding and abetting second-degree manslaughter with culpable negligence, the Star-Tribune reported.