The attack in Highland Park was not the only shooting over a violent holiday weekend.

The attack in Highland Park was not the only shooting over a violent holiday weekend.

The attack at the Highland Park Fourth of July parade was the largest  and highest-profile shooting, but far from the only one, over the  holiday weekend.

The attack at the Highland Park Fourth of July parade was the largest  and highest-profile shooting, but far from the only one, over the  holiday weekend.

It was one of two mass shootings in the Chicago region alone on Monday.

It was one of two mass shootings in the Chicago region alone on Monday.

Less than 12 hours earlier, five people were injured in a shooting on Chicago’s South Side.

Less than 12 hours earlier, five people were injured in a shooting on Chicago’s South Side.

The Highland Park shooting stood out in its size (at least three dozen injured), its deadliness (at least six killed)

The Highland Park shooting stood out in its size (at least three dozen injured), its deadliness (at least six killed)

Wealthy suburb that does not often experience such violence. But it was  part of a pattern: the brutal ubiquity of gun violence in a nation with  more firearms than people.

Wealthy suburb that does not often experience such violence. But it was  part of a pattern: the brutal ubiquity of gun violence in a nation with  more firearms than people.

As of early Monday morning, at least 57 people had been shot in Chicago over the Fourth of July weekend, nine of them fatally

As of early Monday morning, at least 57 people had been shot in Chicago over the Fourth of July weekend, nine of them fatally

That did not include the toll from the Highland Park shooting outside the city.

That did not include the toll from the Highland Park shooting outside the city.

Ten hours before a gunman opened fire at the Fourth of July parade in Highland Park

Ten hours before a gunman opened fire at the Fourth of July parade in Highland Park

Five people were shot around midnight on Monday in Parkway Gardens, a  housing complex in the Greater Grand Crossing neighborhood,

Five people were shot around midnight on Monday in Parkway Gardens, a  housing complex in the Greater Grand Crossing neighborhood,

Where the median household income is nearly $150,000 and more than 80 percent of the population is white.

Where the median household income is nearly $150,000 and more than 80 percent of the population is white.

Where the median household income is less than $30,000 and more than 90 percent of the population is Black.

Where the median household income is less than $30,000 and more than 90 percent of the population is Black.

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