From looking at the FAA registry[1] and googling, it looks like the Anaheim police department operates 3 aircraft: N226PD, an AS350 helicopter; N326PD, another AS350 helicopter; N508BH, a Cessna 208B.<p>N508BH, the Cessna, is probably the one they&#x27;re using for surveillance (See the 2012 OC Register article, &quot;$2.2 million Cessna will help fight crime&quot;[2]).<p>FlightAware shows that N508BH flies to northern california a lot.  You can also see what looks like a probable surveillance flight path at <a href="http:&#x2F;&#x2F;flightaware.com&#x2F;live&#x2F;flight&#x2F;N508BH&#x2F;history&#x2F;20151128&#x2F;2014Z" rel="nofollow">http:&#x2F;&#x2F;flightaware.com&#x2F;live&#x2F;flight&#x2F;N508BH&#x2F;history&#x2F;20151128&#x2F;2...</a><p>Three aircraft for a California city with population 350K  isn&#x27;t crazy--Glendale and Burbank together have about 300K people, and their police forces have gone in together to create a &quot;joint air support division&quot; that has 4 helicopters[3].<p><pre><code>  [1] http:&#x2F;&#x2F;www.faa.gov&#x2F;licenses_certificates&#x2F;aircraft_certification&#x2F;aircraft_registry&#x2F;releasable_aircraft_download&#x2F;
  [2] http:&#x2F;&#x2F;www.ocregister.com&#x2F;articles&#x2F;air-356706-police-cessna.html
  [3] http:&#x2F;&#x2F;www.mdhelicopters.com&#x2F;news&#x2F;pdf&#x2F;2014&#x2F;111914.pdf</code></pre>