Why is there killing and shootings only during the weekend in Chicago?

Almost every Monday, there is a news report about the all the murders in Chicago during the previous weekend.   Like 50 shot and 10 killed, and some details about the most vulnerable victims, usually a kid/baby.  But, what about the weekdays?  Why would the weekends be so different from the weekdays?  So, is it safe to assume that the murder load is probably twice or more what is published in the news?  And, if they are going to keep score for Chicago, shouldn't they keep score for all of the other cities. Like it has to be as bad in Atlanta and Los Angeles and the other democrat strongholds.  Finally, do you think the recent BLM-democrat riots are the beginning of a new concept of the "no law" city which would simply be the expansion of some current areas in cities such as Chicago.  If so, it would be best to get out of Portland while you can still sell your house. Look at the old residences in cities like Detroit.  The last person who abandoned that house took a financial beating when it lost all of its value.