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Chicago police release camera footage after fatal shooting of 13-year-old boy

The weapon used in the Boulder mass shooting was legally purchased, according to the police chief

What we know about shooting victims in Boulder, Colorado

The reason is still unclear in the Boulder mass shooting

The reason is still unclear in the Boulder mass shooting

Colorado shooting suspect charged with 10 counts of murder

What we know about shooting victims in Boulder, Colorado

Police give information about the deadly mass shootings in Boulder, Colorado, at the supermarket

10 shot dead in supermarkets in Boulder, Colorado

10 people shot dead at a supermarket in Boulder, Colorado