And if such worries had ebbed in recent months, an incident yesterday afternoon has rekindled them.
A teenager was hit multiple times during a broad-daylight shooting in Aurora that resulted in three school lockdowns, plus shattered windows and frayed nerves.
At about 1:39 p.m. Thursday, September 10, according to the Aurora Police Department, officers responded to the 12000 block of East Park Lane Drive, an area captured in the following interactive graphic. If you have problems seeing the image, click "View on Google Maps."
There, they found a teenage victim suffering from multiple gunshot wounds.
He was transported to an area hospital, where, at last report, he was in stable condition with injuries that aren't thought to be life-threatening.
Due to the teen's condition, the APD notes that investigators were only able to get a partial statement from the victim about what happened.
However, the department maintains that there are "multiple known suspects" — although no arrests have been announced at this writing.
During the time of the incident, Aurora schools were still in session.
As such, three facilities — Park Lane, Paris Elementary and North Middle School — were locked down for approximately an hour and a half.
Neighbors told CBS4 that at least eight shots were fired in rapid succession.
Evidence of the gun-play was easy to find, as this image from the station's coverage demonstrates:
This damage and other details have led detectives to conclude that the shooting actually took place outside a residence on the 12000 block of East 30th Avenue, a short distance away from the Park Lane Drive location.
Here's an interactive graphic of the second spot.
Among the law-enforcers on the scene afterward were members of Aurora's gang unit.
CBS4 captured images of them using metal detectors to find shell casings, of which there appeared to have been many.
Tensions were already heightened among Aurora police officers this week, following a threatening call to 911.
“It’s time that you guys know we are no longer playing around with the police departments," the unknown individual said. "Aurora and Denver, we are about to start striking fear shooting down all cops that we see by their selves. This will go for the sheriff’s department. You guys are evicting innocent people. Let us catch you by yourself and it’s shots fired.”
Daylight shootings, gang-related or not, don't help matters in the slightest.
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If you have any information about the latest incident, you're encouraged to contact Detective Rick Day at 303-739-1835 or Metro Denver Crime Stoppers at 720-913-STOP (7867), which is offering a reward of up to $2,000 in the case. Look below to see the aforementioned CBS4 piece.