Floyd's girlfriend on their first kiss, drug addictions

Courteney Ross was the first person who personally knew Floyd to testify at the murder trial of Derek Chauvin, the white former Minneapolis police officer caught in widely seen video kneeling on the neck of Floyd, a 46-year-old handcuffed Black man, for about nine minutes.

The footage sparked global protests against police brutality.

"It's a classic story of how many people get addicted to opioids," Ross, 45, who wore a heart-shaped brooch on her black jacket, told the jury. "We both suffered from chronic pain: mine was in my neck, his was in his back."

Chauvin has pleaded not guilty to murder and manslaughter charges. In a central dispute of the trial, his lawyers have argued that Floyd's death, ruled a homicide at the hands of police, was really an overdose caused by the fentanyl found in his blood at autopsy.

Prosecutors from the Minnesota attorney general's office have told the jury they will hear evidence to contradict this, including Ross's testimony about his drug tolerance, and that Floyd's drug use is irrelevant to the charges against Chauvin.