Hey Sigung John, over 26 years on this job and I'm still learning! I never knew that about California. I always thought all states were basically the same as in the New England area. Our state police is the only agency that has state-wide jurisdiction other than of course federal agencies and Department of Natural Resources. We have county sheriff's departments also but their jurisdictional powers lies within the counties they represent. The rest are all city and town police. Boston does have M.B.T.A. (Mass. transit) Police and other cities have Housing Authority Police but they all have their specific jurisdictions and none are state wide. Interesting about California.
As far as citizen's arrest goes, I did research on it back around the mid 80's because there were some questions on it in our department. I was working with the Lt. in charge of training at that time and he had me research it for our town. I might still have all the information somewhere in my files. If I recall, talking to some authorites in my research, the reason why Massachusetts has it the way we do is to prevent some citizens from abusing the powers by having them arrest for misdemeanors according to their own interpretation, not to mention to get back at someone for something. Like KBOWARRIOR stated, the police have to enforce a citizen's arrest whether they believe it was proper or not. Do you guys have that problem in California, the abuse? So ours is on the books as felonies only and it must happen in their presence, again, unless you're a cop and in that case word of mouth is your probable cause when you're outside your jurisdiction.
Also our police academies are standard training curriculums for all city and town police including Department of Natural Resources (wildlife, etc.) State Police varies slightly in the sense that the basic training is longer but the curriculum is essentially the same from what I've seen with maybe more of an emphasis on motor vehicle laws since they are responsible for patroling the state highways.
When I was working narcotics we needed help financially
because our area had a major drug problem with some heavy hitters and we were even working with the state police at the time. We didn't have the money to make big drug buys, so my partner and I asked permission to bring in the Feds, the D.E.A., to work with us and having that cash behind us really opened the doors and we knocked off some pretty heavy people.

One more point that KBOWARRIOR made about California. We have the same problem out here as far as preparing officers for the street with intense D.T. programs and Officer Survival training. Very limited and much too liberal. Its like sending us into a street fight with boxing gloves on with the many constraints they put on us of what we can use and not use. These decisions are made by men and women who sit at their desks in suits and ties or blouses and skirts who don't have a clue and never rolled around on the sidewalk with anyone!

Its really screwed up!

They have no idea how it is to go up against an individual who has no capacity to feel pain and doesn't care at the moment whether he lives or dies or that you do either!

They have no business dictating what is proper police techniques for confrontations with dangerous suspects. Don't get me wrong, we have a head training coordinator who is a veteran cop and black belt in charge of the state program. He is an excellent talent, realistic in his approach and a real good guy BUT he still has to answer to them of what he can teach or not teach in his training curriculum. He is not afraid to make his stand when he attempts to implement something, but, like I said, they have the FINAL word! Sorry for being long winded but as you can tell this is a passion of mine along with every police officer I've ever met!

Shihan Joe