Factbox-Key moments from fourth day of witness testimony at Chauvin trial

View of Chicago Fine Arts Gallery near George Floyd Square, where mementos dedicated to George Floyd are on display, while the city of Minneapolis enters its third day of the trial of Derek Chauvin, who is facing murder charges in the death of George Floyd, in Minneapolis, Minnesota, U.S., March 31, 2021. REUTERS/Octavio Jones

(Reuters) -The jury in the murder trial of former Minneapolis policeman Derek Chauvin heard testimony on Thursday from George Floyd's girlfriend who told of how the couple struggled with addition, and a retired police sergeant who said that Chauvin told him that Floyd was combative and went "crazy" on the night he died.

Chauvin, who is white, had been pressing his knee into the neck of Floyd, a 46-year-old Black man in handcuffs, for about nine minutes, a scene that ignited global protests against police brutality.