Around here everyone just calls on the Denver Sheriff's bird which is busy all the time. Noisiest helicopter in the city, too. Magnitudes louder than any of the plethora of EMS birds.
EMS birds areaves but busy, along with their company-associated fixed wing birds at both KAPA and KBJC, bringing patients in and out of town, who then are usually ground-transported to area hospitals, but there's a lot of patient transfers between fixed and rotary wing at KAPA and KBJC too. AirLife transfers on the Denver Jet Center East Ramp in area Hotel at KAPA near the vehicle gate, Flight For Life typically transfers in the ramp behind the first hangar row along the West ramp near Mayo Aviation unless there's a big jet parked in the alley there.
(Saint Anthony's Flight For Life has the coolest combo paint-job-wise. Both the helo and the King Air are painted bright orange. Giving the nickname of "BOB" to the King Air. Big Orange Bird. She's very photogenic. AirLife's Learjets aren't as pretty but probably block in a bit faster than BOB does.)
Denver's helo is always buzzing my house on its way down Arapahoe Road going and coming from KAPA for gas. I don't mind. Aircraft noise is a good thing, but it and maybe the occasional Army Guard Blackhawks are the only helos one can hear clearly inside my house when the windows are all buttoned up. I have to have windows open or be outside to catch Flight For Life or AirLife's birds going over.
None of the other agencies appears to have any interest or budget for LE whirlybirds. State owns a few fixed-wing assets including a 182 that can be used for LE chores.
News agencies dropped all their multitude of birds the city was known for for years, and went to one leased bird shared by all the stations willing to pony up cash. Network money for live news dried up.
We went from a typical helo number in the city of six to eight that were aloft and sighted all the time -- to three, in the great recession. Probably never see a news helo landing on the hood of a pickup truck with an armed gunman ever again... or see them crash one in Horsetooth Reservoir, the mountains west of Denver hitting power lines across a valley, or down in Cherry Creek ever again either. Denver news was kinda hard on their birds.
Now they don't have any.