An unnamed white Phoenix police officer shot and killed an unarmed 34-year-old black man, Rumain Brisbon, Tuesday evening.

Brandon Dickerson, who told FOX-10 that he was with Brisbon when the officer approached and that he didn’t hear the officer give any commands. According to police, Brisbon ran when approached; the Phoenix Police Department claims that after a brief struggle, Brisbon reached for a bottle of prescription painkillers in his pocket–which the officer mistook for a gun.

Phoenix Police spokesperson Sergeant Trent Crump told the local news station that the officer who shot and killed Brisbon "was doing what we expect him to do, which is fight crime."

Brisbon’s family is being represented by Phoenix attorney Marci Kratter, who told azcentral.com that the story appears incomplete; her office is conducting its own investigation into the killing.