Chicago’s crime problem is made worse when murders like the wave that gripped Chicago last weekend go unsolved.

CBS 2’s Derrick Blakley reports that while other big U.S. cities have shown improvement in arrests, Chicago lags behind…

Critics say the main problem that exists in Chicago is a lack of cooperation from the communities affected by the shootings.

“Relations between police and folks in the Chicago communities have become so fractured and so strained that there’s a fundamental breakdown–an absolute mistrust,” said Locke Bowman of Northwestern University Law School.