The Des Moines Police Department announced an arrest Saturday in the city’s ninth homicide of 2021.According to police, 27-year-old Darren Antwon Diggs, of Des Moines, has been arrested and charged with first-degree murder and first-degree robbery in a deadly Friday morning shooting.Early Friday morning, police were called to the 1600 block of Hull Avenue to investigate multiple reports of gunfire heard in the area.Arriving officers found a 21-year-old man suffering from gunshot wounds inside a vehicle at an apartment complex. The man died at the scene. Police said his family has asked that his identity not be released until later Saturday.Diggs is being held in the Polk County Jail, awaiting an initial court appearance.Police said Diggs and the victim did know each other. The motive appears to be a drug-related robbery, according to police.According to police, this is the ninth Des Moines homicide of 2021. There were 21 homicides in Des Moines in 2020.Check the KCCI Breaking News and Weather App for updates on this developing story.