Pedantry
Minor points: Police helicopters are not piloted by Police Officers. Why go to all the time and expense of training one up when there are plenty of experienced combat trained ex-military pilots only too happy to do the job?
Armed officers have no real use for laser dot aiming on firearms as all they effectively do are to give away your position; not too clever when you're cammed up in a containment position. The much favoured Eotech HDS sights contain their 'red dot' internally within the parallax-free holographic display and are much more effective.
Tasers, on the other hand, use visible laser sight painting to both: a) enable quick firing from any hand/arm position and b) to act as an effective deterant which they invariably do in the majority of deployments, this is also why they are purchased in high viz yellow. Tasers of course can only be used at close quarters and are all but useless in containments.