That article only covers homicide, which is a relatively rare crime. There are many other types of crimes that can warrant a police response and arrest such as property crime, assault, robbery, etc.
In addition, the link provided only covers relative homicide rates, ie what percentage of homicides that occur are committed by member of a given race. It does not address what percentage of individuals in a given demographic that have committed homicide.
These sources from the fbi provide a bit better context:
Of course, looking at crime statistics only through the lens of race and ethnicity also misses a lot of context. Poverty rates have a huge impact on crime rates and due to racism, both present and past, poverty rates in the American black demographic are much higher than poverty rates in the American white demographic.