Yes… always. But I’m also Federal L/E… so…
Now, do I have jurisdiction in local/state stuff? No, but if it’s a felony… I can arrest. I was the first officer (as well as my partner) to arrive on a bank robber a year or so back… completely the right thing to do, but I know other officers that would have kept driving and said they didn’t hear the call.
I’m supposed to do the peace officer class for ME. It isn’t something that I want to do to write tickets, but more to get better versed in ME law (I know NJ law WAY better than ME). We try to help the locals, especially when they are more worked with less pay than us. We also have better technology that they want us to utilize for them… which we do mainly to keep us sharp on the tools.
I’m also in an area where local L/E is spread thin… just the larger town has it (anywhere from 1 to 4 on at any given time). Sheriff does the rest of the county, which is approximately the size of RI and CT combined. Population is approximately 40,000 for the county. Some other local departments, but again in larger towns. County jail and Sheriff office are located here. ME State Police have a barracks, but they are moving just to doing I-95 and major incidents.
Federal… us (CBP), BP and a few HSI. We have a couple US Marshals local. But we are the most concentrated L/E here. BP is behind us, only for the fact that they patrol a decent chunk of the county, so are also spread kind of thin.
Now, if I’m driving in a marked vehicle, and see a traffic stop… I’ll toss the lights on and stop to make sure all is good. That being unless I need to get to a place for a legit reason. If that’s the case, and all looks good… I’ll listen to the radio and make sure nothing happens while I’m nearby. But while they are doing their job, I also have my own responsibilities… to include operating ports of entry that need officers to be present during operational hours.